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e9348cdd CL |
1 | /* |
2 | * Atheros AR9170 driver | |
3 | * | |
4 | * mac80211 interaction code | |
5 | * | |
6 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> | |
7 | * Copyright 2009, Christian Lamparter <chunkeey@web.de> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; see the file COPYING. If not, see | |
21 | * http://www.gnu.org/licenses/. | |
22 | * | |
23 | * This file incorporates work covered by the following copyright and | |
24 | * permission notice: | |
25 | * Copyright (c) 2007-2008 Atheros Communications, Inc. | |
26 | * | |
27 | * Permission to use, copy, modify, and/or distribute this software for any | |
28 | * purpose with or without fee is hereby granted, provided that the above | |
29 | * copyright notice and this permission notice appear in all copies. | |
30 | * | |
31 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
32 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
33 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
34 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
35 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
36 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
37 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
38 | */ | |
39 | ||
e9348cdd | 40 | #include <linux/init.h> |
5a0e3ad6 | 41 | #include <linux/slab.h> |
e9348cdd CL |
42 | #include <linux/module.h> |
43 | #include <linux/etherdevice.h> | |
44 | #include <net/mac80211.h> | |
45 | #include "ar9170.h" | |
46 | #include "hw.h" | |
47 | #include "cmd.h" | |
48 | ||
49 | static int modparam_nohwcrypt; | |
50 | module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO); | |
51 | MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption."); | |
e9348cdd CL |
52 | |
53 | #define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \ | |
54 | .bitrate = (_bitrate), \ | |
55 | .flags = (_flags), \ | |
56 | .hw_value = (_hw_rate) | (_txpidx) << 4, \ | |
57 | } | |
58 | ||
59 | static struct ieee80211_rate __ar9170_ratetable[] = { | |
60 | RATE(10, 0, 0, 0), | |
61 | RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE), | |
62 | RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE), | |
63 | RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE), | |
64 | RATE(60, 0xb, 0, 0), | |
65 | RATE(90, 0xf, 0, 0), | |
66 | RATE(120, 0xa, 0, 0), | |
67 | RATE(180, 0xe, 0, 0), | |
68 | RATE(240, 0x9, 0, 0), | |
69 | RATE(360, 0xd, 1, 0), | |
70 | RATE(480, 0x8, 2, 0), | |
71 | RATE(540, 0xc, 3, 0), | |
72 | }; | |
73 | #undef RATE | |
74 | ||
75 | #define ar9170_g_ratetable (__ar9170_ratetable + 0) | |
76 | #define ar9170_g_ratetable_size 12 | |
77 | #define ar9170_a_ratetable (__ar9170_ratetable + 4) | |
78 | #define ar9170_a_ratetable_size 8 | |
79 | ||
80 | /* | |
81 | * NB: The hw_value is used as an index into the ar9170_phy_freq_params | |
82 | * array in phy.c so that we don't have to do frequency lookups! | |
83 | */ | |
84 | #define CHAN(_freq, _idx) { \ | |
85 | .center_freq = (_freq), \ | |
86 | .hw_value = (_idx), \ | |
87 | .max_power = 18, /* XXX */ \ | |
88 | } | |
89 | ||
90 | static struct ieee80211_channel ar9170_2ghz_chantable[] = { | |
91 | CHAN(2412, 0), | |
92 | CHAN(2417, 1), | |
93 | CHAN(2422, 2), | |
94 | CHAN(2427, 3), | |
95 | CHAN(2432, 4), | |
96 | CHAN(2437, 5), | |
97 | CHAN(2442, 6), | |
98 | CHAN(2447, 7), | |
99 | CHAN(2452, 8), | |
100 | CHAN(2457, 9), | |
101 | CHAN(2462, 10), | |
102 | CHAN(2467, 11), | |
103 | CHAN(2472, 12), | |
104 | CHAN(2484, 13), | |
105 | }; | |
106 | ||
107 | static struct ieee80211_channel ar9170_5ghz_chantable[] = { | |
108 | CHAN(4920, 14), | |
109 | CHAN(4940, 15), | |
110 | CHAN(4960, 16), | |
111 | CHAN(4980, 17), | |
112 | CHAN(5040, 18), | |
113 | CHAN(5060, 19), | |
114 | CHAN(5080, 20), | |
115 | CHAN(5180, 21), | |
116 | CHAN(5200, 22), | |
117 | CHAN(5220, 23), | |
118 | CHAN(5240, 24), | |
119 | CHAN(5260, 25), | |
120 | CHAN(5280, 26), | |
121 | CHAN(5300, 27), | |
122 | CHAN(5320, 28), | |
123 | CHAN(5500, 29), | |
124 | CHAN(5520, 30), | |
125 | CHAN(5540, 31), | |
126 | CHAN(5560, 32), | |
127 | CHAN(5580, 33), | |
128 | CHAN(5600, 34), | |
129 | CHAN(5620, 35), | |
130 | CHAN(5640, 36), | |
131 | CHAN(5660, 37), | |
132 | CHAN(5680, 38), | |
133 | CHAN(5700, 39), | |
134 | CHAN(5745, 40), | |
135 | CHAN(5765, 41), | |
136 | CHAN(5785, 42), | |
137 | CHAN(5805, 43), | |
138 | CHAN(5825, 44), | |
139 | CHAN(5170, 45), | |
140 | CHAN(5190, 46), | |
141 | CHAN(5210, 47), | |
142 | CHAN(5230, 48), | |
143 | }; | |
144 | #undef CHAN | |
145 | ||
9e52b062 JB |
146 | #define AR9170_HT_CAP \ |
147 | { \ | |
148 | .ht_supported = true, \ | |
149 | .cap = IEEE80211_HT_CAP_MAX_AMSDU | \ | |
9e52b062 JB |
150 | IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \ |
151 | IEEE80211_HT_CAP_SGI_40 | \ | |
acbadf01 | 152 | IEEE80211_HT_CAP_GRN_FLD | \ |
9e52b062 JB |
153 | IEEE80211_HT_CAP_DSSSCCK40 | \ |
154 | IEEE80211_HT_CAP_SM_PS, \ | |
083c4687 CL |
155 | .ampdu_factor = 3, \ |
156 | .ampdu_density = 6, \ | |
9e52b062 | 157 | .mcs = { \ |
acbadf01 CL |
158 | .rx_mask = { 0xff, 0xff, 0, 0, 0x1, 0, 0, 0, 0, 0, }, \ |
159 | .rx_highest = cpu_to_le16(300), \ | |
160 | .tx_params = IEEE80211_HT_MCS_TX_DEFINED, \ | |
9e52b062 JB |
161 | }, \ |
162 | } | |
163 | ||
e9348cdd CL |
164 | static struct ieee80211_supported_band ar9170_band_2GHz = { |
165 | .channels = ar9170_2ghz_chantable, | |
166 | .n_channels = ARRAY_SIZE(ar9170_2ghz_chantable), | |
167 | .bitrates = ar9170_g_ratetable, | |
168 | .n_bitrates = ar9170_g_ratetable_size, | |
9e52b062 JB |
169 | .ht_cap = AR9170_HT_CAP, |
170 | }; | |
171 | ||
172 | static struct ieee80211_supported_band ar9170_band_5GHz = { | |
173 | .channels = ar9170_5ghz_chantable, | |
174 | .n_channels = ARRAY_SIZE(ar9170_5ghz_chantable), | |
175 | .bitrates = ar9170_a_ratetable, | |
176 | .n_bitrates = ar9170_a_ratetable_size, | |
177 | .ht_cap = AR9170_HT_CAP, | |
e9348cdd CL |
178 | }; |
179 | ||
9b9c5aae | 180 | static void ar9170_tx(struct ar9170 *ar); |
e9348cdd | 181 | |
acbadf01 CL |
182 | static inline u16 ar9170_get_seq_h(struct ieee80211_hdr *hdr) |
183 | { | |
184 | return le16_to_cpu(hdr->seq_ctrl) >> 4; | |
185 | } | |
186 | ||
187 | static inline u16 ar9170_get_seq(struct sk_buff *skb) | |
188 | { | |
189 | struct ar9170_tx_control *txc = (void *) skb->data; | |
190 | return ar9170_get_seq_h((void *) txc->frame_data); | |
191 | } | |
192 | ||
f3926b49 | 193 | #ifdef AR9170_QUEUE_DEBUG |
e9348cdd CL |
194 | static void ar9170_print_txheader(struct ar9170 *ar, struct sk_buff *skb) |
195 | { | |
196 | struct ar9170_tx_control *txc = (void *) skb->data; | |
9b9c5aae CL |
197 | struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb); |
198 | struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data; | |
199 | struct ieee80211_hdr *hdr = (void *) txc->frame_data; | |
e9348cdd | 200 | |
c96c31e4 JP |
201 | wiphy_debug(ar->hw->wiphy, |
202 | "=> FRAME [skb:%p, q:%d, DA:[%pM] s:%d " | |
203 | "mac_ctrl:%04x, phy_ctrl:%08x, timeout:[%d ms]]\n", | |
204 | skb, skb_get_queue_mapping(skb), | |
205 | ieee80211_get_DA(hdr), ar9170_get_seq_h(hdr), | |
206 | le16_to_cpu(txc->mac_control), le32_to_cpu(txc->phy_control), | |
207 | jiffies_to_msecs(arinfo->timeout - jiffies)); | |
e9348cdd CL |
208 | } |
209 | ||
9b9c5aae CL |
210 | static void __ar9170_dump_txqueue(struct ar9170 *ar, |
211 | struct sk_buff_head *queue) | |
e9348cdd CL |
212 | { |
213 | struct sk_buff *skb; | |
214 | int i = 0; | |
215 | ||
216 | printk(KERN_DEBUG "---[ cut here ]---\n"); | |
c96c31e4 JP |
217 | wiphy_debug(ar->hw->wiphy, "%d entries in queue.\n", |
218 | skb_queue_len(queue)); | |
e9348cdd CL |
219 | |
220 | skb_queue_walk(queue, skb) { | |
b409894f | 221 | printk(KERN_DEBUG "index:%d =>\n", i++); |
e9348cdd CL |
222 | ar9170_print_txheader(ar, skb); |
223 | } | |
9b9c5aae CL |
224 | if (i != skb_queue_len(queue)) |
225 | printk(KERN_DEBUG "WARNING: queue frame counter " | |
226 | "mismatch %d != %d\n", skb_queue_len(queue), i); | |
e9348cdd CL |
227 | printk(KERN_DEBUG "---[ end ]---\n"); |
228 | } | |
f3926b49 | 229 | #endif /* AR9170_QUEUE_DEBUG */ |
e9348cdd | 230 | |
acbadf01 | 231 | #ifdef AR9170_QUEUE_DEBUG |
9b9c5aae CL |
232 | static void ar9170_dump_txqueue(struct ar9170 *ar, |
233 | struct sk_buff_head *queue) | |
234 | { | |
235 | unsigned long flags; | |
236 | ||
237 | spin_lock_irqsave(&queue->lock, flags); | |
238 | __ar9170_dump_txqueue(ar, queue); | |
239 | spin_unlock_irqrestore(&queue->lock, flags); | |
240 | } | |
acbadf01 | 241 | #endif /* AR9170_QUEUE_DEBUG */ |
9b9c5aae | 242 | |
acbadf01 | 243 | #ifdef AR9170_QUEUE_STOP_DEBUG |
9b9c5aae CL |
244 | static void __ar9170_dump_txstats(struct ar9170 *ar) |
245 | { | |
246 | int i; | |
247 | ||
5db55844 | 248 | wiphy_debug(ar->hw->wiphy, "QoS queue stats\n"); |
9b9c5aae CL |
249 | |
250 | for (i = 0; i < __AR9170_NUM_TXQ; i++) | |
c96c31e4 JP |
251 | wiphy_debug(ar->hw->wiphy, |
252 | "queue:%d limit:%d len:%d waitack:%d stopped:%d\n", | |
253 | i, ar->tx_stats[i].limit, ar->tx_stats[i].len, | |
254 | skb_queue_len(&ar->tx_status[i]), | |
255 | ieee80211_queue_stopped(ar->hw, i)); | |
9b9c5aae | 256 | } |
acbadf01 | 257 | #endif /* AR9170_QUEUE_STOP_DEBUG */ |
9b9c5aae | 258 | |
9b9c5aae CL |
259 | /* caller must guarantee exclusive access for _bin_ queue. */ |
260 | static void ar9170_recycle_expired(struct ar9170 *ar, | |
261 | struct sk_buff_head *queue, | |
262 | struct sk_buff_head *bin) | |
263 | { | |
264 | struct sk_buff *skb, *old = NULL; | |
265 | unsigned long flags; | |
266 | ||
267 | spin_lock_irqsave(&queue->lock, flags); | |
268 | while ((skb = skb_peek(queue))) { | |
269 | struct ieee80211_tx_info *txinfo; | |
270 | struct ar9170_tx_info *arinfo; | |
271 | ||
272 | txinfo = IEEE80211_SKB_CB(skb); | |
273 | arinfo = (void *) txinfo->rate_driver_data; | |
274 | ||
275 | if (time_is_before_jiffies(arinfo->timeout)) { | |
276 | #ifdef AR9170_QUEUE_DEBUG | |
c96c31e4 JP |
277 | wiphy_debug(ar->hw->wiphy, |
278 | "[%ld > %ld] frame expired => recycle\n", | |
279 | jiffies, arinfo->timeout); | |
9b9c5aae CL |
280 | ar9170_print_txheader(ar, skb); |
281 | #endif /* AR9170_QUEUE_DEBUG */ | |
282 | __skb_unlink(skb, queue); | |
283 | __skb_queue_tail(bin, skb); | |
284 | } else { | |
285 | break; | |
286 | } | |
287 | ||
288 | if (unlikely(old == skb)) { | |
289 | /* bail out - queue is shot. */ | |
290 | ||
291 | WARN_ON(1); | |
292 | break; | |
293 | } | |
294 | old = skb; | |
295 | } | |
296 | spin_unlock_irqrestore(&queue->lock, flags); | |
297 | } | |
298 | ||
299 | static void ar9170_tx_status(struct ar9170 *ar, struct sk_buff *skb, | |
300 | u16 tx_status) | |
301 | { | |
302 | struct ieee80211_tx_info *txinfo; | |
303 | unsigned int retries = 0; | |
e9348cdd CL |
304 | |
305 | txinfo = IEEE80211_SKB_CB(skb); | |
306 | ieee80211_tx_info_clear_status(txinfo); | |
307 | ||
308 | switch (tx_status) { | |
309 | case AR9170_TX_STATUS_RETRY: | |
310 | retries = 2; | |
311 | case AR9170_TX_STATUS_COMPLETE: | |
312 | txinfo->flags |= IEEE80211_TX_STAT_ACK; | |
313 | break; | |
314 | ||
315 | case AR9170_TX_STATUS_FAILED: | |
316 | retries = ar->hw->conf.long_frame_max_tx_count; | |
317 | break; | |
318 | ||
319 | default: | |
c96c31e4 JP |
320 | wiphy_err(ar->hw->wiphy, |
321 | "invalid tx_status response (%x)\n", tx_status); | |
e9348cdd CL |
322 | break; |
323 | } | |
324 | ||
9b9c5aae | 325 | txinfo->status.rates[0].count = retries + 1; |
e9348cdd CL |
326 | skb_pull(skb, sizeof(struct ar9170_tx_control)); |
327 | ieee80211_tx_status_irqsafe(ar->hw, skb); | |
328 | } | |
e9348cdd | 329 | |
9b9c5aae | 330 | void ar9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb) |
e9348cdd | 331 | { |
9b9c5aae CL |
332 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
333 | struct ar9170_tx_info *arinfo = (void *) info->rate_driver_data; | |
334 | unsigned int queue = skb_get_queue_mapping(skb); | |
e9348cdd | 335 | unsigned long flags; |
e9348cdd | 336 | |
9b9c5aae CL |
337 | spin_lock_irqsave(&ar->tx_stats_lock, flags); |
338 | ar->tx_stats[queue].len--; | |
e9348cdd | 339 | |
53a76b58 | 340 | if (ar->tx_stats[queue].len < AR9170_NUM_TX_LIMIT_SOFT) { |
9b9c5aae | 341 | #ifdef AR9170_QUEUE_STOP_DEBUG |
c96c31e4 | 342 | wiphy_debug(ar->hw->wiphy, "wake queue %d\n", queue); |
9b9c5aae CL |
343 | __ar9170_dump_txstats(ar); |
344 | #endif /* AR9170_QUEUE_STOP_DEBUG */ | |
345 | ieee80211_wake_queue(ar->hw, queue); | |
346 | } | |
347 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
e9348cdd | 348 | |
15b098bb | 349 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) { |
9b9c5aae CL |
350 | ar9170_tx_status(ar, skb, AR9170_TX_STATUS_FAILED); |
351 | } else { | |
f3926b49 CL |
352 | arinfo->timeout = jiffies + |
353 | msecs_to_jiffies(AR9170_TX_TIMEOUT); | |
15b098bb | 354 | |
f3926b49 | 355 | skb_queue_tail(&ar->tx_status[queue], skb); |
9b9c5aae CL |
356 | } |
357 | ||
358 | if (!ar->tx_stats[queue].len && | |
359 | !skb_queue_empty(&ar->tx_pending[queue])) { | |
360 | ar9170_tx(ar); | |
e9348cdd | 361 | } |
e9348cdd CL |
362 | } |
363 | ||
9b9c5aae CL |
364 | static struct sk_buff *ar9170_get_queued_skb(struct ar9170 *ar, |
365 | const u8 *mac, | |
366 | struct sk_buff_head *queue, | |
367 | const u32 rate) | |
e9348cdd | 368 | { |
9b9c5aae | 369 | unsigned long flags; |
e9348cdd CL |
370 | struct sk_buff *skb; |
371 | ||
372 | /* | |
373 | * Unfortunately, the firmware does not tell to which (queued) frame | |
374 | * this transmission status report belongs to. | |
375 | * | |
376 | * So we have to make risky guesses - with the scarce information | |
377 | * the firmware provided (-> destination MAC, and phy_control) - | |
378 | * and hope that we picked the right one... | |
379 | */ | |
e9348cdd | 380 | |
9b9c5aae CL |
381 | spin_lock_irqsave(&queue->lock, flags); |
382 | skb_queue_walk(queue, skb) { | |
383 | struct ar9170_tx_control *txc = (void *) skb->data; | |
384 | struct ieee80211_hdr *hdr = (void *) txc->frame_data; | |
385 | u32 r; | |
386 | ||
387 | if (mac && compare_ether_addr(ieee80211_get_DA(hdr), mac)) { | |
e9348cdd | 388 | #ifdef AR9170_QUEUE_DEBUG |
c96c31e4 | 389 | wiphy_debug(ar->hw->wiphy, |
5db55844 | 390 | "skip frame => DA %pM != %pM\n", |
c96c31e4 | 391 | mac, ieee80211_get_DA(hdr)); |
9b9c5aae CL |
392 | ar9170_print_txheader(ar, skb); |
393 | #endif /* AR9170_QUEUE_DEBUG */ | |
394 | continue; | |
395 | } | |
396 | ||
397 | r = (le32_to_cpu(txc->phy_control) & AR9170_TX_PHY_MCS_MASK) >> | |
398 | AR9170_TX_PHY_MCS_SHIFT; | |
399 | ||
400 | if ((rate != AR9170_TX_INVALID_RATE) && (r != rate)) { | |
401 | #ifdef AR9170_QUEUE_DEBUG | |
c96c31e4 JP |
402 | wiphy_debug(ar->hw->wiphy, |
403 | "skip frame => rate %d != %d\n", rate, r); | |
9b9c5aae CL |
404 | ar9170_print_txheader(ar, skb); |
405 | #endif /* AR9170_QUEUE_DEBUG */ | |
406 | continue; | |
407 | } | |
408 | ||
409 | __skb_unlink(skb, queue); | |
410 | spin_unlock_irqrestore(&queue->lock, flags); | |
411 | return skb; | |
e9348cdd | 412 | } |
9b9c5aae CL |
413 | |
414 | #ifdef AR9170_QUEUE_DEBUG | |
c96c31e4 JP |
415 | wiphy_err(ar->hw->wiphy, |
416 | "ESS:[%pM] does not have any outstanding frames in queue.\n", | |
417 | mac); | |
9b9c5aae | 418 | __ar9170_dump_txqueue(ar, queue); |
e9348cdd | 419 | #endif /* AR9170_QUEUE_DEBUG */ |
9b9c5aae CL |
420 | spin_unlock_irqrestore(&queue->lock, flags); |
421 | ||
422 | return NULL; | |
e9348cdd CL |
423 | } |
424 | ||
425 | /* | |
9b9c5aae CL |
426 | * This worker tries to keeps an maintain tx_status queues. |
427 | * So we can guarantee that incoming tx_status reports are | |
428 | * actually for a pending frame. | |
e9348cdd CL |
429 | */ |
430 | ||
9b9c5aae | 431 | static void ar9170_tx_janitor(struct work_struct *work) |
e9348cdd CL |
432 | { |
433 | struct ar9170 *ar = container_of(work, struct ar9170, | |
9b9c5aae CL |
434 | tx_janitor.work); |
435 | struct sk_buff_head waste; | |
436 | unsigned int i; | |
437 | bool resched = false; | |
e9348cdd | 438 | |
4a48e2a4 CL |
439 | if (unlikely(!IS_STARTED(ar))) |
440 | return ; | |
441 | ||
9b9c5aae CL |
442 | skb_queue_head_init(&waste); |
443 | ||
444 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { | |
e9348cdd | 445 | #ifdef AR9170_QUEUE_DEBUG |
c96c31e4 JP |
446 | wiphy_debug(ar->hw->wiphy, "garbage collector scans queue:%d\n", |
447 | i); | |
9b9c5aae CL |
448 | ar9170_dump_txqueue(ar, &ar->tx_pending[i]); |
449 | ar9170_dump_txqueue(ar, &ar->tx_status[i]); | |
e9348cdd | 450 | #endif /* AR9170_QUEUE_DEBUG */ |
e9348cdd | 451 | |
9b9c5aae CL |
452 | ar9170_recycle_expired(ar, &ar->tx_status[i], &waste); |
453 | ar9170_recycle_expired(ar, &ar->tx_pending[i], &waste); | |
454 | skb_queue_purge(&waste); | |
e9348cdd | 455 | |
9b9c5aae CL |
456 | if (!skb_queue_empty(&ar->tx_status[i]) || |
457 | !skb_queue_empty(&ar->tx_pending[i])) | |
458 | resched = true; | |
e9348cdd CL |
459 | } |
460 | ||
42935eca LR |
461 | if (!resched) |
462 | return; | |
463 | ||
464 | ieee80211_queue_delayed_work(ar->hw, | |
465 | &ar->tx_janitor, | |
466 | msecs_to_jiffies(AR9170_JANITOR_DELAY)); | |
e9348cdd CL |
467 | } |
468 | ||
66d00813 | 469 | void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len) |
e9348cdd CL |
470 | { |
471 | struct ar9170_cmd_response *cmd = (void *) buf; | |
472 | ||
473 | if ((cmd->type & 0xc0) != 0xc0) { | |
474 | ar->callback_cmd(ar, len, buf); | |
475 | return; | |
476 | } | |
477 | ||
478 | /* hardware event handlers */ | |
479 | switch (cmd->type) { | |
480 | case 0xc1: { | |
481 | /* | |
482 | * TX status notification: | |
483 | * bytes: 0c c1 XX YY M1 M2 M3 M4 M5 M6 R4 R3 R2 R1 S2 S1 | |
484 | * | |
485 | * XX always 81 | |
486 | * YY always 00 | |
487 | * M1-M6 is the MAC address | |
488 | * R1-R4 is the transmit rate | |
489 | * S1-S2 is the transmit status | |
490 | */ | |
491 | ||
492 | struct sk_buff *skb; | |
9b9c5aae CL |
493 | u32 phy = le32_to_cpu(cmd->tx_status.rate); |
494 | u32 q = (phy & AR9170_TX_PHY_QOS_MASK) >> | |
495 | AR9170_TX_PHY_QOS_SHIFT; | |
496 | #ifdef AR9170_QUEUE_DEBUG | |
c96c31e4 JP |
497 | wiphy_debug(ar->hw->wiphy, |
498 | "recv tx_status for %pm, p:%08x, q:%d\n", | |
499 | cmd->tx_status.dst, phy, q); | |
9b9c5aae | 500 | #endif /* AR9170_QUEUE_DEBUG */ |
e9348cdd | 501 | |
9b9c5aae CL |
502 | skb = ar9170_get_queued_skb(ar, cmd->tx_status.dst, |
503 | &ar->tx_status[q], | |
504 | AR9170_TX_INVALID_RATE); | |
e9348cdd CL |
505 | if (unlikely(!skb)) |
506 | return ; | |
507 | ||
9b9c5aae | 508 | ar9170_tx_status(ar, skb, le16_to_cpu(cmd->tx_status.status)); |
e9348cdd CL |
509 | break; |
510 | } | |
511 | ||
512 | case 0xc0: | |
513 | /* | |
514 | * pre-TBTT event | |
515 | */ | |
516 | if (ar->vif && ar->vif->type == NL80211_IFTYPE_AP) | |
42935eca | 517 | ieee80211_queue_work(ar->hw, &ar->beacon_work); |
e9348cdd CL |
518 | break; |
519 | ||
520 | case 0xc2: | |
521 | /* | |
522 | * (IBSS) beacon send notification | |
523 | * bytes: 04 c2 XX YY B4 B3 B2 B1 | |
524 | * | |
525 | * XX always 80 | |
526 | * YY always 00 | |
527 | * B1-B4 "should" be the number of send out beacons. | |
528 | */ | |
529 | break; | |
530 | ||
531 | case 0xc3: | |
532 | /* End of Atim Window */ | |
533 | break; | |
534 | ||
535 | case 0xc4: | |
acbadf01 CL |
536 | /* BlockACK bitmap */ |
537 | break; | |
538 | ||
e9348cdd CL |
539 | case 0xc5: |
540 | /* BlockACK events */ | |
541 | break; | |
542 | ||
543 | case 0xc6: | |
544 | /* Watchdog Interrupt */ | |
545 | break; | |
546 | ||
547 | case 0xc9: | |
548 | /* retransmission issue / SIFS/EIFS collision ?! */ | |
549 | break; | |
550 | ||
2543a0c4 JB |
551 | /* firmware debug */ |
552 | case 0xca: | |
b409894f LB |
553 | printk(KERN_DEBUG "ar9170 FW: %.*s\n", len - 4, |
554 | (char *)buf + 4); | |
2543a0c4 JB |
555 | break; |
556 | case 0xcb: | |
557 | len -= 4; | |
558 | ||
559 | switch (len) { | |
560 | case 1: | |
561 | printk(KERN_DEBUG "ar9170 FW: u8: %#.2x\n", | |
562 | *((char *)buf + 4)); | |
563 | break; | |
564 | case 2: | |
565 | printk(KERN_DEBUG "ar9170 FW: u8: %#.4x\n", | |
566 | le16_to_cpup((__le16 *)((char *)buf + 4))); | |
567 | break; | |
568 | case 4: | |
569 | printk(KERN_DEBUG "ar9170 FW: u8: %#.8x\n", | |
570 | le32_to_cpup((__le32 *)((char *)buf + 4))); | |
571 | break; | |
572 | case 8: | |
573 | printk(KERN_DEBUG "ar9170 FW: u8: %#.16lx\n", | |
574 | (unsigned long)le64_to_cpup( | |
575 | (__le64 *)((char *)buf + 4))); | |
576 | break; | |
577 | } | |
578 | break; | |
579 | case 0xcc: | |
580 | print_hex_dump_bytes("ar9170 FW:", DUMP_PREFIX_NONE, | |
581 | (char *)buf + 4, len - 4); | |
582 | break; | |
583 | ||
e9348cdd | 584 | default: |
c96c31e4 | 585 | pr_info("received unhandled event %x\n", cmd->type); |
e9348cdd CL |
586 | print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE, buf, len); |
587 | break; | |
588 | } | |
589 | } | |
590 | ||
cca84799 | 591 | static void ar9170_rx_reset_rx_mpdu(struct ar9170 *ar) |
e9348cdd | 592 | { |
cca84799 CL |
593 | memset(&ar->rx_mpdu.plcp, 0, sizeof(struct ar9170_rx_head)); |
594 | ar->rx_mpdu.has_plcp = false; | |
595 | } | |
e9348cdd | 596 | |
9b9c5aae | 597 | int ar9170_nag_limiter(struct ar9170 *ar) |
cca84799 CL |
598 | { |
599 | bool print_message; | |
600 | ||
601 | /* | |
602 | * we expect all sorts of errors in promiscuous mode. | |
603 | * don't bother with it, it's OK! | |
604 | */ | |
605 | if (ar->sniffer_enabled) | |
606 | return false; | |
607 | ||
608 | /* | |
609 | * only go for frequent errors! The hardware tends to | |
610 | * do some stupid thing once in a while under load, in | |
611 | * noisy environments or just for fun! | |
612 | */ | |
613 | if (time_before(jiffies, ar->bad_hw_nagger) && net_ratelimit()) | |
614 | print_message = true; | |
615 | else | |
616 | print_message = false; | |
617 | ||
618 | /* reset threshold for "once in a while" */ | |
619 | ar->bad_hw_nagger = jiffies + HZ / 4; | |
620 | return print_message; | |
621 | } | |
622 | ||
623 | static int ar9170_rx_mac_status(struct ar9170 *ar, | |
624 | struct ar9170_rx_head *head, | |
625 | struct ar9170_rx_macstatus *mac, | |
626 | struct ieee80211_rx_status *status) | |
627 | { | |
628 | u8 error, decrypt; | |
e9348cdd | 629 | |
e9348cdd | 630 | BUILD_BUG_ON(sizeof(struct ar9170_rx_head) != 12); |
cca84799 | 631 | BUILD_BUG_ON(sizeof(struct ar9170_rx_macstatus) != 4); |
e9348cdd | 632 | |
cca84799 CL |
633 | error = mac->error; |
634 | if (error & AR9170_RX_ERROR_MMIC) { | |
635 | status->flag |= RX_FLAG_MMIC_ERROR; | |
636 | error &= ~AR9170_RX_ERROR_MMIC; | |
637 | } | |
e9348cdd | 638 | |
cca84799 CL |
639 | if (error & AR9170_RX_ERROR_PLCP) { |
640 | status->flag |= RX_FLAG_FAILED_PLCP_CRC; | |
641 | error &= ~AR9170_RX_ERROR_PLCP; | |
e9348cdd | 642 | |
cca84799 CL |
643 | if (!(ar->filter_state & FIF_PLCPFAIL)) |
644 | return -EINVAL; | |
645 | } | |
e9348cdd | 646 | |
cca84799 CL |
647 | if (error & AR9170_RX_ERROR_FCS) { |
648 | status->flag |= RX_FLAG_FAILED_FCS_CRC; | |
649 | error &= ~AR9170_RX_ERROR_FCS; | |
e9348cdd | 650 | |
cca84799 CL |
651 | if (!(ar->filter_state & FIF_FCSFAIL)) |
652 | return -EINVAL; | |
653 | } | |
654 | ||
655 | decrypt = ar9170_get_decrypt_type(mac); | |
656 | if (!(decrypt & AR9170_RX_ENC_SOFTWARE) && | |
657 | decrypt != AR9170_ENC_ALG_NONE) | |
658 | status->flag |= RX_FLAG_DECRYPTED; | |
e9348cdd | 659 | |
cca84799 CL |
660 | /* ignore wrong RA errors */ |
661 | error &= ~AR9170_RX_ERROR_WRONG_RA; | |
e9348cdd | 662 | |
cca84799 CL |
663 | if (error & AR9170_RX_ERROR_DECRYPT) { |
664 | error &= ~AR9170_RX_ERROR_DECRYPT; | |
665 | /* | |
666 | * Rx decryption is done in place, | |
667 | * the original data is lost anyway. | |
668 | */ | |
669 | ||
670 | return -EINVAL; | |
671 | } | |
672 | ||
673 | /* drop any other error frames */ | |
674 | if (unlikely(error)) { | |
675 | /* TODO: update netdevice's RX dropped/errors statistics */ | |
676 | ||
677 | if (ar9170_nag_limiter(ar)) | |
c96c31e4 JP |
678 | wiphy_debug(ar->hw->wiphy, |
679 | "received frame with suspicious error code (%#x).\n", | |
680 | error); | |
cca84799 CL |
681 | |
682 | return -EINVAL; | |
683 | } | |
684 | ||
685 | status->band = ar->channel->band; | |
686 | status->freq = ar->channel->center_freq; | |
687 | ||
688 | switch (mac->status & AR9170_RX_STATUS_MODULATION_MASK) { | |
e9348cdd | 689 | case AR9170_RX_STATUS_MODULATION_CCK: |
cca84799 CL |
690 | if (mac->status & AR9170_RX_STATUS_SHORT_PREAMBLE) |
691 | status->flag |= RX_FLAG_SHORTPRE; | |
e9348cdd CL |
692 | switch (head->plcp[0]) { |
693 | case 0x0a: | |
cca84799 | 694 | status->rate_idx = 0; |
e9348cdd CL |
695 | break; |
696 | case 0x14: | |
cca84799 | 697 | status->rate_idx = 1; |
e9348cdd CL |
698 | break; |
699 | case 0x37: | |
cca84799 | 700 | status->rate_idx = 2; |
e9348cdd CL |
701 | break; |
702 | case 0x6e: | |
cca84799 | 703 | status->rate_idx = 3; |
e9348cdd CL |
704 | break; |
705 | default: | |
cca84799 | 706 | if (ar9170_nag_limiter(ar)) |
c96c31e4 JP |
707 | wiphy_err(ar->hw->wiphy, |
708 | "invalid plcp cck rate (%x).\n", | |
709 | head->plcp[0]); | |
cca84799 | 710 | return -EINVAL; |
e9348cdd CL |
711 | } |
712 | break; | |
cca84799 | 713 | |
7d57b73a | 714 | case AR9170_RX_STATUS_MODULATION_DUPOFDM: |
e9348cdd | 715 | case AR9170_RX_STATUS_MODULATION_OFDM: |
cca84799 CL |
716 | switch (head->plcp[0] & 0xf) { |
717 | case 0xb: | |
718 | status->rate_idx = 0; | |
e9348cdd | 719 | break; |
cca84799 CL |
720 | case 0xf: |
721 | status->rate_idx = 1; | |
e9348cdd | 722 | break; |
cca84799 CL |
723 | case 0xa: |
724 | status->rate_idx = 2; | |
e9348cdd | 725 | break; |
cca84799 CL |
726 | case 0xe: |
727 | status->rate_idx = 3; | |
e9348cdd CL |
728 | break; |
729 | case 0x9: | |
cca84799 | 730 | status->rate_idx = 4; |
e9348cdd | 731 | break; |
cca84799 CL |
732 | case 0xd: |
733 | status->rate_idx = 5; | |
e9348cdd CL |
734 | break; |
735 | case 0x8: | |
cca84799 | 736 | status->rate_idx = 6; |
e9348cdd | 737 | break; |
cca84799 CL |
738 | case 0xc: |
739 | status->rate_idx = 7; | |
e9348cdd CL |
740 | break; |
741 | default: | |
cca84799 | 742 | if (ar9170_nag_limiter(ar)) |
c96c31e4 JP |
743 | wiphy_err(ar->hw->wiphy, |
744 | "invalid plcp ofdm rate (%x).\n", | |
745 | head->plcp[0]); | |
cca84799 | 746 | return -EINVAL; |
e9348cdd | 747 | } |
cca84799 CL |
748 | if (status->band == IEEE80211_BAND_2GHZ) |
749 | status->rate_idx += 4; | |
e9348cdd | 750 | break; |
cca84799 | 751 | |
e9348cdd | 752 | case AR9170_RX_STATUS_MODULATION_HT: |
cca84799 CL |
753 | if (head->plcp[3] & 0x80) |
754 | status->flag |= RX_FLAG_40MHZ; | |
755 | if (head->plcp[6] & 0x80) | |
756 | status->flag |= RX_FLAG_SHORT_GI; | |
757 | ||
758 | status->rate_idx = clamp(0, 75, head->plcp[6] & 0x7f); | |
759 | status->flag |= RX_FLAG_HT; | |
760 | break; | |
761 | ||
7d57b73a | 762 | default: |
cca84799 | 763 | if (ar9170_nag_limiter(ar)) |
c96c31e4 | 764 | wiphy_err(ar->hw->wiphy, "invalid modulation\n"); |
cca84799 | 765 | return -EINVAL; |
e9348cdd CL |
766 | } |
767 | ||
cca84799 CL |
768 | return 0; |
769 | } | |
e9348cdd | 770 | |
cca84799 CL |
771 | static void ar9170_rx_phy_status(struct ar9170 *ar, |
772 | struct ar9170_rx_phystatus *phy, | |
773 | struct ieee80211_rx_status *status) | |
774 | { | |
775 | int i; | |
e9348cdd | 776 | |
cca84799 CL |
777 | BUILD_BUG_ON(sizeof(struct ar9170_rx_phystatus) != 20); |
778 | ||
779 | for (i = 0; i < 3; i++) | |
780 | if (phy->rssi[i] != 0x80) | |
781 | status->antenna |= BIT(i); | |
782 | ||
783 | /* post-process RSSI */ | |
784 | for (i = 0; i < 7; i++) | |
785 | if (phy->rssi[i] & 0x80) | |
786 | phy->rssi[i] = ((phy->rssi[i] & 0x7f) + 1) & 0x7f; | |
787 | ||
788 | /* TODO: we could do something with phy_errors */ | |
789 | status->signal = ar->noise[0] + phy->rssi_combined; | |
cca84799 CL |
790 | } |
791 | ||
792 | static struct sk_buff *ar9170_rx_copy_data(u8 *buf, int len) | |
793 | { | |
794 | struct sk_buff *skb; | |
795 | int reserved = 0; | |
796 | struct ieee80211_hdr *hdr = (void *) buf; | |
797 | ||
798 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
799 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
800 | reserved += NET_IP_ALIGN; | |
801 | ||
802 | if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT) | |
803 | reserved += NET_IP_ALIGN; | |
e9348cdd CL |
804 | } |
805 | ||
cca84799 CL |
806 | if (ieee80211_has_a4(hdr->frame_control)) |
807 | reserved += NET_IP_ALIGN; | |
808 | ||
809 | reserved = 32 + (reserved & NET_IP_ALIGN); | |
810 | ||
811 | skb = dev_alloc_skb(len + reserved); | |
812 | if (likely(skb)) { | |
813 | skb_reserve(skb, reserved); | |
814 | memcpy(skb_put(skb, len), buf, len); | |
e9348cdd CL |
815 | } |
816 | ||
cca84799 CL |
817 | return skb; |
818 | } | |
e9348cdd | 819 | |
cca84799 CL |
820 | /* |
821 | * If the frame alignment is right (or the kernel has | |
822 | * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS), and there | |
823 | * is only a single MPDU in the USB frame, then we could | |
824 | * submit to mac80211 the SKB directly. However, since | |
825 | * there may be multiple packets in one SKB in stream | |
826 | * mode, and we need to observe the proper ordering, | |
827 | * this is non-trivial. | |
828 | */ | |
e9348cdd | 829 | |
cca84799 CL |
830 | static void ar9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len) |
831 | { | |
832 | struct ar9170_rx_head *head; | |
833 | struct ar9170_rx_macstatus *mac; | |
834 | struct ar9170_rx_phystatus *phy = NULL; | |
835 | struct ieee80211_rx_status status; | |
836 | struct sk_buff *skb; | |
837 | int mpdu_len; | |
838 | ||
839 | if (unlikely(!IS_STARTED(ar) || len < (sizeof(*mac)))) | |
840 | return ; | |
841 | ||
842 | /* Received MPDU */ | |
843 | mpdu_len = len - sizeof(*mac); | |
844 | ||
845 | mac = (void *)(buf + mpdu_len); | |
846 | if (unlikely(mac->error & AR9170_RX_ERROR_FATAL)) { | |
847 | /* this frame is too damaged and can't be used - drop it */ | |
e9348cdd | 848 | |
e9348cdd CL |
849 | return ; |
850 | } | |
851 | ||
cca84799 CL |
852 | switch (mac->status & AR9170_RX_STATUS_MPDU_MASK) { |
853 | case AR9170_RX_STATUS_MPDU_FIRST: | |
854 | /* first mpdu packet has the plcp header */ | |
855 | if (likely(mpdu_len >= sizeof(struct ar9170_rx_head))) { | |
856 | head = (void *) buf; | |
857 | memcpy(&ar->rx_mpdu.plcp, (void *) buf, | |
858 | sizeof(struct ar9170_rx_head)); | |
859 | ||
860 | mpdu_len -= sizeof(struct ar9170_rx_head); | |
861 | buf += sizeof(struct ar9170_rx_head); | |
862 | ar->rx_mpdu.has_plcp = true; | |
863 | } else { | |
864 | if (ar9170_nag_limiter(ar)) | |
c96c31e4 JP |
865 | wiphy_err(ar->hw->wiphy, |
866 | "plcp info is clipped.\n"); | |
cca84799 CL |
867 | return ; |
868 | } | |
869 | break; | |
870 | ||
871 | case AR9170_RX_STATUS_MPDU_LAST: | |
872 | /* last mpdu has a extra tail with phy status information */ | |
873 | ||
874 | if (likely(mpdu_len >= sizeof(struct ar9170_rx_phystatus))) { | |
875 | mpdu_len -= sizeof(struct ar9170_rx_phystatus); | |
876 | phy = (void *)(buf + mpdu_len); | |
877 | } else { | |
878 | if (ar9170_nag_limiter(ar)) | |
c96c31e4 JP |
879 | wiphy_err(ar->hw->wiphy, |
880 | "frame tail is clipped.\n"); | |
cca84799 CL |
881 | return ; |
882 | } | |
883 | ||
884 | case AR9170_RX_STATUS_MPDU_MIDDLE: | |
885 | /* middle mpdus are just data */ | |
886 | if (unlikely(!ar->rx_mpdu.has_plcp)) { | |
887 | if (!ar9170_nag_limiter(ar)) | |
888 | return ; | |
889 | ||
c96c31e4 JP |
890 | wiphy_err(ar->hw->wiphy, |
891 | "rx stream did not start with a first_mpdu frame tag.\n"); | |
cca84799 CL |
892 | |
893 | return ; | |
894 | } | |
895 | ||
896 | head = &ar->rx_mpdu.plcp; | |
897 | break; | |
898 | ||
899 | case AR9170_RX_STATUS_MPDU_SINGLE: | |
900 | /* single mpdu - has plcp (head) and phy status (tail) */ | |
901 | head = (void *) buf; | |
902 | ||
903 | mpdu_len -= sizeof(struct ar9170_rx_head); | |
904 | mpdu_len -= sizeof(struct ar9170_rx_phystatus); | |
905 | ||
906 | buf += sizeof(struct ar9170_rx_head); | |
907 | phy = (void *)(buf + mpdu_len); | |
908 | break; | |
909 | ||
910 | default: | |
911 | BUG_ON(1); | |
912 | break; | |
e9348cdd CL |
913 | } |
914 | ||
cca84799 CL |
915 | if (unlikely(mpdu_len < FCS_LEN)) |
916 | return ; | |
e9348cdd | 917 | |
cca84799 CL |
918 | memset(&status, 0, sizeof(status)); |
919 | if (unlikely(ar9170_rx_mac_status(ar, head, mac, &status))) | |
920 | return ; | |
e9348cdd | 921 | |
cca84799 CL |
922 | if (phy) |
923 | ar9170_rx_phy_status(ar, phy, &status); | |
e9348cdd | 924 | |
cca84799 | 925 | skb = ar9170_rx_copy_data(buf, mpdu_len); |
f1d58c25 JB |
926 | if (likely(skb)) { |
927 | memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); | |
928 | ieee80211_rx_irqsafe(ar->hw, skb); | |
929 | } | |
e9348cdd CL |
930 | } |
931 | ||
e9348cdd CL |
932 | void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb) |
933 | { | |
cca84799 | 934 | unsigned int i, tlen, resplen, wlen = 0, clen = 0; |
e9348cdd CL |
935 | u8 *tbuf, *respbuf; |
936 | ||
937 | tbuf = skb->data; | |
938 | tlen = skb->len; | |
939 | ||
940 | while (tlen >= 4) { | |
cca84799 CL |
941 | clen = tbuf[1] << 8 | tbuf[0]; |
942 | wlen = ALIGN(clen, 4); | |
e9348cdd | 943 | |
cca84799 | 944 | /* check if this is stream has a valid tag.*/ |
e9348cdd | 945 | if (tbuf[2] != 0 || tbuf[3] != 0x4e) { |
cca84799 CL |
946 | /* |
947 | * TODO: handle the highly unlikely event that the | |
948 | * corrupted stream has the TAG at the right position. | |
949 | */ | |
950 | ||
951 | /* check if the frame can be repaired. */ | |
952 | if (!ar->rx_failover_missing) { | |
953 | /* this is no "short read". */ | |
954 | if (ar9170_nag_limiter(ar)) { | |
c96c31e4 JP |
955 | wiphy_err(ar->hw->wiphy, |
956 | "missing tag!\n"); | |
cca84799 CL |
957 | goto err_telluser; |
958 | } else | |
959 | goto err_silent; | |
960 | } | |
961 | ||
962 | if (ar->rx_failover_missing > tlen) { | |
963 | if (ar9170_nag_limiter(ar)) { | |
c96c31e4 JP |
964 | wiphy_err(ar->hw->wiphy, |
965 | "possible multi stream corruption!\n"); | |
cca84799 CL |
966 | goto err_telluser; |
967 | } else | |
968 | goto err_silent; | |
969 | } | |
970 | ||
971 | memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen); | |
972 | ar->rx_failover_missing -= tlen; | |
973 | ||
974 | if (ar->rx_failover_missing <= 0) { | |
975 | /* | |
976 | * nested ar9170_rx call! | |
25985edc | 977 | * termination is guaranteed, even when the |
cca84799 CL |
978 | * combined frame also have a element with |
979 | * a bad tag. | |
980 | */ | |
981 | ||
982 | ar->rx_failover_missing = 0; | |
983 | ar9170_rx(ar, ar->rx_failover); | |
984 | ||
985 | skb_reset_tail_pointer(ar->rx_failover); | |
986 | skb_trim(ar->rx_failover, 0); | |
987 | } | |
988 | ||
e9348cdd CL |
989 | return ; |
990 | } | |
cca84799 CL |
991 | |
992 | /* check if stream is clipped */ | |
e9348cdd | 993 | if (wlen > tlen - 4) { |
cca84799 CL |
994 | if (ar->rx_failover_missing) { |
995 | /* TODO: handle double stream corruption. */ | |
996 | if (ar9170_nag_limiter(ar)) { | |
c96c31e4 JP |
997 | wiphy_err(ar->hw->wiphy, |
998 | "double rx stream corruption!\n"); | |
cca84799 CL |
999 | goto err_telluser; |
1000 | } else | |
1001 | goto err_silent; | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * save incomplete data set. | |
1006 | * the firmware will resend the missing bits when | |
1007 | * the rx - descriptor comes round again. | |
1008 | */ | |
1009 | ||
1010 | memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen); | |
1011 | ar->rx_failover_missing = clen - tlen; | |
e9348cdd CL |
1012 | return ; |
1013 | } | |
1014 | resplen = clen; | |
1015 | respbuf = tbuf + 4; | |
1016 | tbuf += wlen + 4; | |
1017 | tlen -= wlen + 4; | |
1018 | ||
1019 | i = 0; | |
1020 | ||
1021 | /* weird thing, but this is the same in the original driver */ | |
1022 | while (resplen > 2 && i < 12 && | |
1023 | respbuf[0] == 0xff && respbuf[1] == 0xff) { | |
1024 | i += 2; | |
1025 | resplen -= 2; | |
1026 | respbuf += 2; | |
1027 | } | |
1028 | ||
1029 | if (resplen < 4) | |
1030 | continue; | |
1031 | ||
1032 | /* found the 6 * 0xffff marker? */ | |
1033 | if (i == 12) | |
1034 | ar9170_handle_command_response(ar, respbuf, resplen); | |
1035 | else | |
cca84799 | 1036 | ar9170_handle_mpdu(ar, respbuf, clen); |
e9348cdd CL |
1037 | } |
1038 | ||
cca84799 CL |
1039 | if (tlen) { |
1040 | if (net_ratelimit()) | |
c96c31e4 JP |
1041 | wiphy_err(ar->hw->wiphy, |
1042 | "%d bytes of unprocessed data left in rx stream!\n", | |
1043 | tlen); | |
cca84799 CL |
1044 | |
1045 | goto err_telluser; | |
1046 | } | |
1047 | ||
1048 | return ; | |
1049 | ||
1050 | err_telluser: | |
c96c31e4 JP |
1051 | wiphy_err(ar->hw->wiphy, |
1052 | "damaged RX stream data [want:%d, data:%d, rx:%d, pending:%d ]\n", | |
1053 | clen, wlen, tlen, ar->rx_failover_missing); | |
cca84799 CL |
1054 | |
1055 | if (ar->rx_failover_missing) | |
1056 | print_hex_dump_bytes("rxbuf:", DUMP_PREFIX_OFFSET, | |
1057 | ar->rx_failover->data, | |
1058 | ar->rx_failover->len); | |
1059 | ||
1060 | print_hex_dump_bytes("stream:", DUMP_PREFIX_OFFSET, | |
1061 | skb->data, skb->len); | |
1062 | ||
c96c31e4 JP |
1063 | wiphy_err(ar->hw->wiphy, |
1064 | "If you see this message frequently, please check your hardware and cables.\n"); | |
cca84799 CL |
1065 | |
1066 | err_silent: | |
1067 | if (ar->rx_failover_missing) { | |
1068 | skb_reset_tail_pointer(ar->rx_failover); | |
1069 | skb_trim(ar->rx_failover, 0); | |
1070 | ar->rx_failover_missing = 0; | |
1071 | } | |
e9348cdd | 1072 | } |
e9348cdd CL |
1073 | |
1074 | #define AR9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \ | |
1075 | do { \ | |
1076 | queue.aifs = ai_fs; \ | |
1077 | queue.cw_min = cwmin; \ | |
1078 | queue.cw_max = cwmax; \ | |
1079 | queue.txop = _txop; \ | |
1080 | } while (0) | |
1081 | ||
1082 | static int ar9170_op_start(struct ieee80211_hw *hw) | |
1083 | { | |
1084 | struct ar9170 *ar = hw->priv; | |
1085 | int err, i; | |
1086 | ||
1087 | mutex_lock(&ar->mutex); | |
1088 | ||
1089 | /* reinitialize queues statistics */ | |
1090 | memset(&ar->tx_stats, 0, sizeof(ar->tx_stats)); | |
9b9c5aae CL |
1091 | for (i = 0; i < __AR9170_NUM_TXQ; i++) |
1092 | ar->tx_stats[i].limit = AR9170_TXQ_DEPTH; | |
e9348cdd CL |
1093 | |
1094 | /* reset QoS defaults */ | |
1095 | AR9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023, 0); /* BEST EFFORT*/ | |
1096 | AR9170_FILL_QUEUE(ar->edcf[1], 7, 15, 1023, 0); /* BACKGROUND */ | |
1097 | AR9170_FILL_QUEUE(ar->edcf[2], 2, 7, 15, 94); /* VIDEO */ | |
1098 | AR9170_FILL_QUEUE(ar->edcf[3], 2, 3, 7, 47); /* VOICE */ | |
1099 | AR9170_FILL_QUEUE(ar->edcf[4], 2, 3, 7, 0); /* SPECIAL */ | |
1100 | ||
acbadf01 CL |
1101 | /* set sane AMPDU defaults */ |
1102 | ar->global_ampdu_density = 6; | |
1103 | ar->global_ampdu_factor = 3; | |
1104 | ||
cca84799 CL |
1105 | ar->bad_hw_nagger = jiffies; |
1106 | ||
e9348cdd CL |
1107 | err = ar->open(ar); |
1108 | if (err) | |
1109 | goto out; | |
1110 | ||
1111 | err = ar9170_init_mac(ar); | |
1112 | if (err) | |
1113 | goto out; | |
1114 | ||
1115 | err = ar9170_set_qos(ar); | |
1116 | if (err) | |
1117 | goto out; | |
1118 | ||
1119 | err = ar9170_init_phy(ar, IEEE80211_BAND_2GHZ); | |
1120 | if (err) | |
1121 | goto out; | |
1122 | ||
1123 | err = ar9170_init_rf(ar); | |
1124 | if (err) | |
1125 | goto out; | |
1126 | ||
1127 | /* start DMA */ | |
1128 | err = ar9170_write_reg(ar, 0x1c3d30, 0x100); | |
1129 | if (err) | |
1130 | goto out; | |
1131 | ||
1132 | ar->state = AR9170_STARTED; | |
1133 | ||
1134 | out: | |
1135 | mutex_unlock(&ar->mutex); | |
1136 | return err; | |
1137 | } | |
1138 | ||
1139 | static void ar9170_op_stop(struct ieee80211_hw *hw) | |
1140 | { | |
1141 | struct ar9170 *ar = hw->priv; | |
9b9c5aae | 1142 | unsigned int i; |
e9348cdd CL |
1143 | |
1144 | if (IS_STARTED(ar)) | |
1145 | ar->state = AR9170_IDLE; | |
1146 | ||
9b9c5aae | 1147 | cancel_delayed_work_sync(&ar->tx_janitor); |
ff8365ca | 1148 | #ifdef CONFIG_AR9170_LEDS |
acbadf01 | 1149 | cancel_delayed_work_sync(&ar->led_work); |
ff8365ca | 1150 | #endif |
e9348cdd | 1151 | cancel_work_sync(&ar->beacon_work); |
e351cfbf | 1152 | |
b55d6bcf | 1153 | mutex_lock(&ar->mutex); |
e9348cdd CL |
1154 | |
1155 | if (IS_ACCEPTING_CMD(ar)) { | |
1156 | ar9170_set_leds_state(ar, 0); | |
1157 | ||
1158 | /* stop DMA */ | |
1159 | ar9170_write_reg(ar, 0x1c3d30, 0); | |
1160 | ar->stop(ar); | |
1161 | } | |
1162 | ||
9b9c5aae CL |
1163 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { |
1164 | skb_queue_purge(&ar->tx_pending[i]); | |
1165 | skb_queue_purge(&ar->tx_status[i]); | |
1166 | } | |
acbadf01 | 1167 | |
e9348cdd CL |
1168 | mutex_unlock(&ar->mutex); |
1169 | } | |
1170 | ||
9b9c5aae | 1171 | static int ar9170_tx_prepare(struct ar9170 *ar, struct sk_buff *skb) |
e9348cdd | 1172 | { |
e9348cdd CL |
1173 | struct ieee80211_hdr *hdr; |
1174 | struct ar9170_tx_control *txc; | |
1175 | struct ieee80211_tx_info *info; | |
e9348cdd | 1176 | struct ieee80211_tx_rate *txrate; |
9b9c5aae | 1177 | struct ar9170_tx_info *arinfo; |
e9348cdd | 1178 | unsigned int queue = skb_get_queue_mapping(skb); |
e9348cdd CL |
1179 | u16 keytype = 0; |
1180 | u16 len, icv = 0; | |
e9348cdd | 1181 | |
9b9c5aae | 1182 | BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data)); |
e9348cdd CL |
1183 | |
1184 | hdr = (void *)skb->data; | |
1185 | info = IEEE80211_SKB_CB(skb); | |
1186 | len = skb->len; | |
1187 | ||
e9348cdd CL |
1188 | txc = (void *)skb_push(skb, sizeof(*txc)); |
1189 | ||
e9348cdd CL |
1190 | if (info->control.hw_key) { |
1191 | icv = info->control.hw_key->icv_len; | |
1192 | ||
97359d12 JB |
1193 | switch (info->control.hw_key->cipher) { |
1194 | case WLAN_CIPHER_SUITE_WEP40: | |
1195 | case WLAN_CIPHER_SUITE_WEP104: | |
1196 | case WLAN_CIPHER_SUITE_TKIP: | |
e9348cdd CL |
1197 | keytype = AR9170_TX_MAC_ENCR_RC4; |
1198 | break; | |
97359d12 | 1199 | case WLAN_CIPHER_SUITE_CCMP: |
e9348cdd CL |
1200 | keytype = AR9170_TX_MAC_ENCR_AES; |
1201 | break; | |
1202 | default: | |
1203 | WARN_ON(1); | |
9b9c5aae | 1204 | goto err_out; |
e9348cdd CL |
1205 | } |
1206 | } | |
1207 | ||
1208 | /* Length */ | |
1209 | txc->length = cpu_to_le16(len + icv + 4); | |
1210 | ||
1211 | txc->mac_control = cpu_to_le16(AR9170_TX_MAC_HW_DURATION | | |
1212 | AR9170_TX_MAC_BACKOFF); | |
1213 | txc->mac_control |= cpu_to_le16(ar9170_qos_hwmap[queue] << | |
1214 | AR9170_TX_MAC_QOS_SHIFT); | |
1215 | txc->mac_control |= cpu_to_le16(keytype); | |
1216 | txc->phy_control = cpu_to_le32(0); | |
1217 | ||
1218 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1219 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_NO_ACK); | |
1220 | ||
e9348cdd | 1221 | txrate = &info->control.rates[0]; |
e9348cdd CL |
1222 | if (txrate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
1223 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS); | |
1224 | else if (txrate->flags & IEEE80211_TX_RC_USE_RTS_CTS) | |
1225 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS); | |
1226 | ||
9b9c5aae CL |
1227 | arinfo = (void *)info->rate_driver_data; |
1228 | arinfo->timeout = jiffies + msecs_to_jiffies(AR9170_QUEUE_TIMEOUT); | |
1229 | ||
1230 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && | |
1231 | (is_valid_ether_addr(ieee80211_get_DA(hdr)))) { | |
9b9c5aae CL |
1232 | /* |
1233 | * WARNING: | |
1234 | * Putting the QoS queue bits into an unexplored territory is | |
1235 | * certainly not elegant. | |
1236 | * | |
1237 | * In my defense: This idea provides a reasonable way to | |
1238 | * smuggle valuable information to the tx_status callback. | |
1239 | * Also, the idea behind this bit-abuse came straight from | |
1240 | * the original driver code. | |
1241 | */ | |
1242 | ||
1243 | txc->phy_control |= | |
1244 | cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT); | |
15b098bb | 1245 | |
f3926b49 | 1246 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE); |
9b9c5aae CL |
1247 | } |
1248 | ||
9b9c5aae CL |
1249 | return 0; |
1250 | ||
1251 | err_out: | |
1252 | skb_pull(skb, sizeof(*txc)); | |
1253 | return -EINVAL; | |
1254 | } | |
1255 | ||
1256 | static void ar9170_tx_prepare_phy(struct ar9170 *ar, struct sk_buff *skb) | |
1257 | { | |
1258 | struct ar9170_tx_control *txc; | |
1259 | struct ieee80211_tx_info *info; | |
1260 | struct ieee80211_rate *rate = NULL; | |
1261 | struct ieee80211_tx_rate *txrate; | |
1262 | u32 power, chains; | |
1263 | ||
1264 | txc = (void *) skb->data; | |
1265 | info = IEEE80211_SKB_CB(skb); | |
1266 | txrate = &info->control.rates[0]; | |
1267 | ||
e9348cdd CL |
1268 | if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD) |
1269 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD); | |
1270 | ||
1271 | if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) | |
1272 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_PREAMBLE); | |
1273 | ||
1274 | if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
1275 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ); | |
1276 | /* this works because 40 MHz is 2 and dup is 3 */ | |
1277 | if (txrate->flags & IEEE80211_TX_RC_DUP_DATA) | |
1278 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ_DUP); | |
1279 | ||
1280 | if (txrate->flags & IEEE80211_TX_RC_SHORT_GI) | |
1281 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_GI); | |
1282 | ||
1283 | if (txrate->flags & IEEE80211_TX_RC_MCS) { | |
1284 | u32 r = txrate->idx; | |
1285 | u8 *txpower; | |
1286 | ||
9b9c5aae CL |
1287 | /* heavy clip control */ |
1288 | txc->phy_control |= cpu_to_le32((r & 0x7) << 7); | |
1289 | ||
e9348cdd | 1290 | r <<= AR9170_TX_PHY_MCS_SHIFT; |
9b9c5aae CL |
1291 | BUG_ON(r & ~AR9170_TX_PHY_MCS_MASK); |
1292 | ||
e9348cdd CL |
1293 | txc->phy_control |= cpu_to_le32(r & AR9170_TX_PHY_MCS_MASK); |
1294 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_MOD_HT); | |
1295 | ||
1296 | if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) { | |
1297 | if (info->band == IEEE80211_BAND_5GHZ) | |
1298 | txpower = ar->power_5G_ht40; | |
1299 | else | |
1300 | txpower = ar->power_2G_ht40; | |
1301 | } else { | |
1302 | if (info->band == IEEE80211_BAND_5GHZ) | |
1303 | txpower = ar->power_5G_ht20; | |
1304 | else | |
1305 | txpower = ar->power_2G_ht20; | |
1306 | } | |
1307 | ||
1308 | power = txpower[(txrate->idx) & 7]; | |
1309 | } else { | |
1310 | u8 *txpower; | |
1311 | u32 mod; | |
1312 | u32 phyrate; | |
1313 | u8 idx = txrate->idx; | |
1314 | ||
1315 | if (info->band != IEEE80211_BAND_2GHZ) { | |
1316 | idx += 4; | |
1317 | txpower = ar->power_5G_leg; | |
1318 | mod = AR9170_TX_PHY_MOD_OFDM; | |
1319 | } else { | |
1320 | if (idx < 4) { | |
1321 | txpower = ar->power_2G_cck; | |
1322 | mod = AR9170_TX_PHY_MOD_CCK; | |
1323 | } else { | |
1324 | mod = AR9170_TX_PHY_MOD_OFDM; | |
1325 | txpower = ar->power_2G_ofdm; | |
1326 | } | |
1327 | } | |
1328 | ||
1329 | rate = &__ar9170_ratetable[idx]; | |
1330 | ||
1331 | phyrate = rate->hw_value & 0xF; | |
1332 | power = txpower[(rate->hw_value & 0x30) >> 4]; | |
1333 | phyrate <<= AR9170_TX_PHY_MCS_SHIFT; | |
1334 | ||
1335 | txc->phy_control |= cpu_to_le32(mod); | |
1336 | txc->phy_control |= cpu_to_le32(phyrate); | |
1337 | } | |
1338 | ||
1339 | power <<= AR9170_TX_PHY_TX_PWR_SHIFT; | |
1340 | power &= AR9170_TX_PHY_TX_PWR_MASK; | |
1341 | txc->phy_control |= cpu_to_le32(power); | |
1342 | ||
1343 | /* set TX chains */ | |
1344 | if (ar->eeprom.tx_mask == 1) { | |
1345 | chains = AR9170_TX_PHY_TXCHAIN_1; | |
1346 | } else { | |
1347 | chains = AR9170_TX_PHY_TXCHAIN_2; | |
1348 | ||
1349 | /* >= 36M legacy OFDM - use only one chain */ | |
1350 | if (rate && rate->bitrate >= 360) | |
1351 | chains = AR9170_TX_PHY_TXCHAIN_1; | |
1352 | } | |
1353 | txc->phy_control |= cpu_to_le32(chains << AR9170_TX_PHY_TXCHAIN_SHIFT); | |
9b9c5aae | 1354 | } |
e9348cdd | 1355 | |
9b9c5aae CL |
1356 | static void ar9170_tx(struct ar9170 *ar) |
1357 | { | |
1358 | struct sk_buff *skb; | |
1359 | unsigned long flags; | |
1360 | struct ieee80211_tx_info *info; | |
1361 | struct ar9170_tx_info *arinfo; | |
1362 | unsigned int i, frames, frames_failed, remaining_space; | |
1363 | int err; | |
1364 | bool schedule_garbagecollector = false; | |
e9348cdd | 1365 | |
9b9c5aae | 1366 | BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data)); |
e9348cdd | 1367 | |
9b9c5aae CL |
1368 | if (unlikely(!IS_STARTED(ar))) |
1369 | return ; | |
1370 | ||
1371 | remaining_space = AR9170_TX_MAX_PENDING; | |
1372 | ||
1373 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { | |
1374 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
53a76b58 CL |
1375 | frames = min(ar->tx_stats[i].limit - ar->tx_stats[i].len, |
1376 | skb_queue_len(&ar->tx_pending[i])); | |
1377 | ||
1378 | if (remaining_space < frames) { | |
1379 | #ifdef AR9170_QUEUE_DEBUG | |
c96c31e4 JP |
1380 | wiphy_debug(ar->hw->wiphy, |
1381 | "tx quota reached queue:%d, " | |
1382 | "remaining slots:%d, needed:%d\n", | |
1383 | i, remaining_space, frames); | |
53a76b58 CL |
1384 | #endif /* AR9170_QUEUE_DEBUG */ |
1385 | frames = remaining_space; | |
1386 | } | |
1387 | ||
1388 | ar->tx_stats[i].len += frames; | |
1389 | ar->tx_stats[i].count += frames; | |
9b9c5aae CL |
1390 | if (ar->tx_stats[i].len >= ar->tx_stats[i].limit) { |
1391 | #ifdef AR9170_QUEUE_DEBUG | |
c96c31e4 JP |
1392 | wiphy_debug(ar->hw->wiphy, "queue %d full\n", i); |
1393 | wiphy_debug(ar->hw->wiphy, "stuck frames: ===>\n"); | |
9b9c5aae CL |
1394 | ar9170_dump_txqueue(ar, &ar->tx_pending[i]); |
1395 | ar9170_dump_txqueue(ar, &ar->tx_status[i]); | |
1396 | #endif /* AR9170_QUEUE_DEBUG */ | |
acbadf01 CL |
1397 | |
1398 | #ifdef AR9170_QUEUE_STOP_DEBUG | |
c96c31e4 | 1399 | wiphy_debug(ar->hw->wiphy, "stop queue %d\n", i); |
acbadf01 CL |
1400 | __ar9170_dump_txstats(ar); |
1401 | #endif /* AR9170_QUEUE_STOP_DEBUG */ | |
9b9c5aae | 1402 | ieee80211_stop_queue(ar->hw, i); |
9b9c5aae | 1403 | } |
e9348cdd | 1404 | |
9b9c5aae CL |
1405 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); |
1406 | ||
1407 | if (!frames) | |
1408 | continue; | |
1409 | ||
1410 | frames_failed = 0; | |
1411 | while (frames) { | |
1412 | skb = skb_dequeue(&ar->tx_pending[i]); | |
1413 | if (unlikely(!skb)) { | |
1414 | frames_failed += frames; | |
1415 | frames = 0; | |
1416 | break; | |
1417 | } | |
1418 | ||
1419 | info = IEEE80211_SKB_CB(skb); | |
1420 | arinfo = (void *) info->rate_driver_data; | |
1421 | ||
1422 | /* TODO: cancel stuck frames */ | |
1423 | arinfo->timeout = jiffies + | |
1424 | msecs_to_jiffies(AR9170_TX_TIMEOUT); | |
1425 | ||
1426 | #ifdef AR9170_QUEUE_DEBUG | |
c96c31e4 | 1427 | wiphy_debug(ar->hw->wiphy, "send frame q:%d =>\n", i); |
9b9c5aae CL |
1428 | ar9170_print_txheader(ar, skb); |
1429 | #endif /* AR9170_QUEUE_DEBUG */ | |
1430 | ||
1431 | err = ar->tx(ar, skb); | |
1432 | if (unlikely(err)) { | |
1433 | frames_failed++; | |
1434 | dev_kfree_skb_any(skb); | |
1435 | } else { | |
1436 | remaining_space--; | |
1437 | schedule_garbagecollector = true; | |
1438 | } | |
1439 | ||
1440 | frames--; | |
1441 | } | |
1442 | ||
1443 | #ifdef AR9170_QUEUE_DEBUG | |
c96c31e4 JP |
1444 | wiphy_debug(ar->hw->wiphy, |
1445 | "ar9170_tx report for queue %d\n", i); | |
9b9c5aae | 1446 | |
c96c31e4 JP |
1447 | wiphy_debug(ar->hw->wiphy, |
1448 | "unprocessed pending frames left:\n"); | |
9b9c5aae CL |
1449 | ar9170_dump_txqueue(ar, &ar->tx_pending[i]); |
1450 | #endif /* AR9170_QUEUE_DEBUG */ | |
1451 | ||
1452 | if (unlikely(frames_failed)) { | |
1453 | #ifdef AR9170_QUEUE_DEBUG | |
c96c31e4 JP |
1454 | wiphy_debug(ar->hw->wiphy, |
1455 | "frames failed %d =>\n", frames_failed); | |
9b9c5aae CL |
1456 | #endif /* AR9170_QUEUE_DEBUG */ |
1457 | ||
1458 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
1459 | ar->tx_stats[i].len -= frames_failed; | |
1460 | ar->tx_stats[i].count -= frames_failed; | |
acbadf01 | 1461 | #ifdef AR9170_QUEUE_STOP_DEBUG |
c96c31e4 | 1462 | wiphy_debug(ar->hw->wiphy, "wake queue %d\n", i); |
acbadf01 CL |
1463 | __ar9170_dump_txstats(ar); |
1464 | #endif /* AR9170_QUEUE_STOP_DEBUG */ | |
9b9c5aae CL |
1465 | ieee80211_wake_queue(ar->hw, i); |
1466 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
e9348cdd CL |
1467 | } |
1468 | } | |
1469 | ||
42935eca LR |
1470 | if (!schedule_garbagecollector) |
1471 | return; | |
1472 | ||
1473 | ieee80211_queue_delayed_work(ar->hw, | |
1474 | &ar->tx_janitor, | |
1475 | msecs_to_jiffies(AR9170_JANITOR_DELAY)); | |
9b9c5aae CL |
1476 | } |
1477 | ||
7bb45683 | 1478 | void ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb) |
9b9c5aae CL |
1479 | { |
1480 | struct ar9170 *ar = hw->priv; | |
1481 | struct ieee80211_tx_info *info; | |
f3926b49 | 1482 | unsigned int queue; |
9b9c5aae CL |
1483 | |
1484 | if (unlikely(!IS_STARTED(ar))) | |
1485 | goto err_free; | |
1486 | ||
1487 | if (unlikely(ar9170_tx_prepare(ar, skb))) | |
1488 | goto err_free; | |
1489 | ||
f3926b49 | 1490 | queue = skb_get_queue_mapping(skb); |
9b9c5aae | 1491 | info = IEEE80211_SKB_CB(skb); |
f3926b49 CL |
1492 | ar9170_tx_prepare_phy(ar, skb); |
1493 | skb_queue_tail(&ar->tx_pending[queue], skb); | |
e9348cdd | 1494 | |
9b9c5aae | 1495 | ar9170_tx(ar); |
7bb45683 | 1496 | return; |
e9348cdd | 1497 | |
e9348cdd | 1498 | err_free: |
9b9c5aae | 1499 | dev_kfree_skb_any(skb); |
e9348cdd CL |
1500 | } |
1501 | ||
1502 | static int ar9170_op_add_interface(struct ieee80211_hw *hw, | |
1ed32e4f | 1503 | struct ieee80211_vif *vif) |
e9348cdd CL |
1504 | { |
1505 | struct ar9170 *ar = hw->priv; | |
8c727e70 | 1506 | struct ath_common *common = &ar->common; |
e9348cdd CL |
1507 | int err = 0; |
1508 | ||
1509 | mutex_lock(&ar->mutex); | |
1510 | ||
1511 | if (ar->vif) { | |
1512 | err = -EBUSY; | |
1513 | goto unlock; | |
1514 | } | |
1515 | ||
1ed32e4f JB |
1516 | ar->vif = vif; |
1517 | memcpy(common->macaddr, vif->addr, ETH_ALEN); | |
e9348cdd CL |
1518 | |
1519 | if (modparam_nohwcrypt || (ar->vif->type != NL80211_IFTYPE_STATION)) { | |
1520 | ar->rx_software_decryption = true; | |
1521 | ar->disable_offload = true; | |
1522 | } | |
1523 | ||
1524 | ar->cur_filter = 0; | |
eeef4185 | 1525 | err = ar9170_update_frame_filter(ar, AR9170_MAC_REG_FTF_DEFAULTS); |
e9348cdd CL |
1526 | if (err) |
1527 | goto unlock; | |
1528 | ||
1529 | err = ar9170_set_operating_mode(ar); | |
1530 | ||
1531 | unlock: | |
1532 | mutex_unlock(&ar->mutex); | |
1533 | return err; | |
1534 | } | |
1535 | ||
1536 | static void ar9170_op_remove_interface(struct ieee80211_hw *hw, | |
1ed32e4f | 1537 | struct ieee80211_vif *vif) |
e9348cdd CL |
1538 | { |
1539 | struct ar9170 *ar = hw->priv; | |
1540 | ||
1541 | mutex_lock(&ar->mutex); | |
1542 | ar->vif = NULL; | |
eeef4185 | 1543 | ar9170_update_frame_filter(ar, 0); |
e9348cdd CL |
1544 | ar9170_set_beacon_timers(ar); |
1545 | dev_kfree_skb(ar->beacon); | |
1546 | ar->beacon = NULL; | |
1547 | ar->sniffer_enabled = false; | |
1548 | ar->rx_software_decryption = false; | |
1549 | ar9170_set_operating_mode(ar); | |
1550 | mutex_unlock(&ar->mutex); | |
1551 | } | |
1552 | ||
1553 | static int ar9170_op_config(struct ieee80211_hw *hw, u32 changed) | |
1554 | { | |
1555 | struct ar9170 *ar = hw->priv; | |
1556 | int err = 0; | |
1557 | ||
1558 | mutex_lock(&ar->mutex); | |
1559 | ||
e9348cdd CL |
1560 | if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) { |
1561 | /* TODO */ | |
1562 | err = 0; | |
1563 | } | |
1564 | ||
1565 | if (changed & IEEE80211_CONF_CHANGE_PS) { | |
1566 | /* TODO */ | |
1567 | err = 0; | |
1568 | } | |
1569 | ||
1570 | if (changed & IEEE80211_CONF_CHANGE_POWER) { | |
1571 | /* TODO */ | |
1572 | err = 0; | |
1573 | } | |
1574 | ||
1575 | if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) { | |
1576 | /* | |
1577 | * is it long_frame_max_tx_count or short_frame_max_tx_count? | |
1578 | */ | |
1579 | ||
1580 | err = ar9170_set_hwretry_limit(ar, | |
1581 | ar->hw->conf.long_frame_max_tx_count); | |
1582 | if (err) | |
1583 | goto out; | |
1584 | } | |
1585 | ||
e9348cdd | 1586 | if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { |
29ceff5d CL |
1587 | |
1588 | /* adjust slot time for 5 GHz */ | |
1589 | err = ar9170_set_slot_time(ar); | |
1590 | if (err) | |
1591 | goto out; | |
1592 | ||
1593 | err = ar9170_set_dyn_sifs_ack(ar); | |
1594 | if (err) | |
1595 | goto out; | |
1596 | ||
e9348cdd | 1597 | err = ar9170_set_channel(ar, hw->conf.channel, |
9e52b062 JB |
1598 | AR9170_RFI_NONE, |
1599 | nl80211_to_ar9170(hw->conf.channel_type)); | |
e9348cdd CL |
1600 | if (err) |
1601 | goto out; | |
e9348cdd CL |
1602 | } |
1603 | ||
1604 | out: | |
1605 | mutex_unlock(&ar->mutex); | |
1606 | return err; | |
1607 | } | |
1608 | ||
22bedad3 JP |
1609 | static u64 ar9170_op_prepare_multicast(struct ieee80211_hw *hw, |
1610 | struct netdev_hw_addr_list *mc_list) | |
3ac64bee JB |
1611 | { |
1612 | u64 mchash; | |
22bedad3 | 1613 | struct netdev_hw_addr *ha; |
3ac64bee JB |
1614 | |
1615 | /* always get broadcast frames */ | |
1616 | mchash = 1ULL << (0xff >> 2); | |
1617 | ||
22bedad3 JP |
1618 | netdev_hw_addr_list_for_each(ha, mc_list) |
1619 | mchash |= 1ULL << (ha->addr[5] >> 2); | |
3ac64bee JB |
1620 | |
1621 | return mchash; | |
1622 | } | |
1623 | ||
e9348cdd CL |
1624 | static void ar9170_op_configure_filter(struct ieee80211_hw *hw, |
1625 | unsigned int changed_flags, | |
1626 | unsigned int *new_flags, | |
3ac64bee | 1627 | u64 multicast) |
e9348cdd CL |
1628 | { |
1629 | struct ar9170 *ar = hw->priv; | |
1630 | ||
eeef4185 CL |
1631 | if (unlikely(!IS_ACCEPTING_CMD(ar))) |
1632 | return ; | |
1633 | ||
1634 | mutex_lock(&ar->mutex); | |
1635 | ||
e9348cdd CL |
1636 | /* mask supported flags */ |
1637 | *new_flags &= FIF_ALLMULTI | FIF_CONTROL | FIF_BCN_PRBRESP_PROMISC | | |
cca84799 CL |
1638 | FIF_PROMISC_IN_BSS | FIF_FCSFAIL | FIF_PLCPFAIL; |
1639 | ar->filter_state = *new_flags; | |
e9348cdd CL |
1640 | /* |
1641 | * We can support more by setting the sniffer bit and | |
1642 | * then checking the error flags, later. | |
1643 | */ | |
1644 | ||
3ac64bee | 1645 | if (changed_flags & FIF_ALLMULTI && *new_flags & FIF_ALLMULTI) |
eeef4185 | 1646 | multicast = ~0ULL; |
e9348cdd | 1647 | |
eeef4185 CL |
1648 | if (multicast != ar->cur_mc_hash) |
1649 | ar9170_update_multicast(ar, multicast); | |
e9348cdd CL |
1650 | |
1651 | if (changed_flags & FIF_CONTROL) { | |
1652 | u32 filter = AR9170_MAC_REG_FTF_PSPOLL | | |
1653 | AR9170_MAC_REG_FTF_RTS | | |
1654 | AR9170_MAC_REG_FTF_CTS | | |
1655 | AR9170_MAC_REG_FTF_ACK | | |
1656 | AR9170_MAC_REG_FTF_CFE | | |
1657 | AR9170_MAC_REG_FTF_CFE_ACK; | |
1658 | ||
1659 | if (*new_flags & FIF_CONTROL) | |
eeef4185 | 1660 | filter |= ar->cur_filter; |
e9348cdd | 1661 | else |
eeef4185 | 1662 | filter &= (~ar->cur_filter); |
e9348cdd | 1663 | |
eeef4185 | 1664 | ar9170_update_frame_filter(ar, filter); |
e9348cdd CL |
1665 | } |
1666 | ||
1667 | if (changed_flags & FIF_PROMISC_IN_BSS) { | |
1668 | ar->sniffer_enabled = ((*new_flags) & FIF_PROMISC_IN_BSS) != 0; | |
eeef4185 | 1669 | ar9170_set_operating_mode(ar); |
e9348cdd CL |
1670 | } |
1671 | ||
eeef4185 | 1672 | mutex_unlock(&ar->mutex); |
e9348cdd CL |
1673 | } |
1674 | ||
eeef4185 | 1675 | |
e9348cdd CL |
1676 | static void ar9170_op_bss_info_changed(struct ieee80211_hw *hw, |
1677 | struct ieee80211_vif *vif, | |
1678 | struct ieee80211_bss_conf *bss_conf, | |
1679 | u32 changed) | |
1680 | { | |
1681 | struct ar9170 *ar = hw->priv; | |
8c727e70 | 1682 | struct ath_common *common = &ar->common; |
e9348cdd CL |
1683 | int err = 0; |
1684 | ||
1685 | mutex_lock(&ar->mutex); | |
1686 | ||
2d0ddec5 | 1687 | if (changed & BSS_CHANGED_BSSID) { |
8c727e70 | 1688 | memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); |
2d0ddec5 | 1689 | err = ar9170_set_operating_mode(ar); |
29ceff5d CL |
1690 | if (err) |
1691 | goto out; | |
2d0ddec5 JB |
1692 | } |
1693 | ||
ea39d1a4 JA |
1694 | if (changed & BSS_CHANGED_BEACON_ENABLED) |
1695 | ar->enable_beacon = bss_conf->enable_beacon; | |
1696 | ||
1697 | if (changed & BSS_CHANGED_BEACON) { | |
2d0ddec5 | 1698 | err = ar9170_update_beacon(ar); |
29ceff5d CL |
1699 | if (err) |
1700 | goto out; | |
ea39d1a4 | 1701 | } |
2d0ddec5 | 1702 | |
ea39d1a4 JA |
1703 | if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON | |
1704 | BSS_CHANGED_BEACON_INT)) { | |
29ceff5d CL |
1705 | err = ar9170_set_beacon_timers(ar); |
1706 | if (err) | |
1707 | goto out; | |
1708 | } | |
e9348cdd CL |
1709 | |
1710 | if (changed & BSS_CHANGED_ASSOC) { | |
e9348cdd CL |
1711 | #ifndef CONFIG_AR9170_LEDS |
1712 | /* enable assoc LED. */ | |
1713 | err = ar9170_set_leds_state(ar, bss_conf->assoc ? 2 : 0); | |
1714 | #endif /* CONFIG_AR9170_LEDS */ | |
1715 | } | |
1716 | ||
1717 | if (changed & BSS_CHANGED_HT) { | |
1718 | /* TODO */ | |
1719 | err = 0; | |
1720 | } | |
1721 | ||
1722 | if (changed & BSS_CHANGED_ERP_SLOT) { | |
29ceff5d CL |
1723 | err = ar9170_set_slot_time(ar); |
1724 | if (err) | |
1725 | goto out; | |
e9348cdd CL |
1726 | } |
1727 | ||
1728 | if (changed & BSS_CHANGED_BASIC_RATES) { | |
29ceff5d CL |
1729 | err = ar9170_set_basic_rates(ar); |
1730 | if (err) | |
1731 | goto out; | |
e9348cdd CL |
1732 | } |
1733 | ||
29ceff5d | 1734 | out: |
e9348cdd CL |
1735 | mutex_unlock(&ar->mutex); |
1736 | } | |
1737 | ||
1738 | static u64 ar9170_op_get_tsf(struct ieee80211_hw *hw) | |
1739 | { | |
1740 | struct ar9170 *ar = hw->priv; | |
1741 | int err; | |
e9348cdd | 1742 | u64 tsf; |
181af387 JA |
1743 | #define NR 3 |
1744 | static const u32 addr[NR] = { AR9170_MAC_REG_TSF_H, | |
1745 | AR9170_MAC_REG_TSF_L, | |
1746 | AR9170_MAC_REG_TSF_H }; | |
1747 | u32 val[NR]; | |
1748 | int loops = 0; | |
e9348cdd CL |
1749 | |
1750 | mutex_lock(&ar->mutex); | |
181af387 JA |
1751 | |
1752 | while (loops++ < 10) { | |
1753 | err = ar9170_read_mreg(ar, NR, addr, val); | |
1754 | if (err || val[0] == val[2]) | |
1755 | break; | |
1756 | } | |
1757 | ||
e9348cdd CL |
1758 | mutex_unlock(&ar->mutex); |
1759 | ||
1760 | if (WARN_ON(err)) | |
1761 | return 0; | |
181af387 JA |
1762 | tsf = val[0]; |
1763 | tsf = (tsf << 32) | val[1]; | |
e9348cdd | 1764 | return tsf; |
181af387 | 1765 | #undef NR |
e9348cdd CL |
1766 | } |
1767 | ||
1768 | static int ar9170_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, | |
1769 | struct ieee80211_vif *vif, struct ieee80211_sta *sta, | |
1770 | struct ieee80211_key_conf *key) | |
1771 | { | |
1772 | struct ar9170 *ar = hw->priv; | |
1773 | int err = 0, i; | |
1774 | u8 ktype; | |
1775 | ||
1776 | if ((!ar->vif) || (ar->disable_offload)) | |
1777 | return -EOPNOTSUPP; | |
1778 | ||
97359d12 JB |
1779 | switch (key->cipher) { |
1780 | case WLAN_CIPHER_SUITE_WEP40: | |
1781 | ktype = AR9170_ENC_ALG_WEP64; | |
1782 | break; | |
1783 | case WLAN_CIPHER_SUITE_WEP104: | |
1784 | ktype = AR9170_ENC_ALG_WEP128; | |
e9348cdd | 1785 | break; |
97359d12 | 1786 | case WLAN_CIPHER_SUITE_TKIP: |
e9348cdd CL |
1787 | ktype = AR9170_ENC_ALG_TKIP; |
1788 | break; | |
97359d12 | 1789 | case WLAN_CIPHER_SUITE_CCMP: |
e9348cdd CL |
1790 | ktype = AR9170_ENC_ALG_AESCCMP; |
1791 | break; | |
1792 | default: | |
1793 | return -EOPNOTSUPP; | |
1794 | } | |
1795 | ||
1796 | mutex_lock(&ar->mutex); | |
1797 | if (cmd == SET_KEY) { | |
1798 | if (unlikely(!IS_STARTED(ar))) { | |
1799 | err = -EOPNOTSUPP; | |
1800 | goto out; | |
1801 | } | |
1802 | ||
1803 | /* group keys need all-zeroes address */ | |
1804 | if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
1805 | sta = NULL; | |
1806 | ||
1807 | if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) { | |
1808 | for (i = 0; i < 64; i++) | |
1809 | if (!(ar->usedkeys & BIT(i))) | |
1810 | break; | |
1811 | if (i == 64) { | |
1812 | ar->rx_software_decryption = true; | |
1813 | ar9170_set_operating_mode(ar); | |
1814 | err = -ENOSPC; | |
1815 | goto out; | |
1816 | } | |
1817 | } else { | |
1818 | i = 64 + key->keyidx; | |
1819 | } | |
1820 | ||
1821 | key->hw_key_idx = i; | |
1822 | ||
1823 | err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, ktype, 0, | |
1824 | key->key, min_t(u8, 16, key->keylen)); | |
1825 | if (err) | |
1826 | goto out; | |
1827 | ||
97359d12 | 1828 | if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
e9348cdd CL |
1829 | err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, |
1830 | ktype, 1, key->key + 16, 16); | |
1831 | if (err) | |
1832 | goto out; | |
1833 | ||
1834 | /* | |
1835 | * hardware is not capable generating the MMIC | |
1836 | * for fragmented frames! | |
1837 | */ | |
1838 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; | |
1839 | } | |
1840 | ||
1841 | if (i < 64) | |
1842 | ar->usedkeys |= BIT(i); | |
1843 | ||
1844 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
1845 | } else { | |
1846 | if (unlikely(!IS_STARTED(ar))) { | |
1847 | /* The device is gone... together with the key ;-) */ | |
1848 | err = 0; | |
1849 | goto out; | |
1850 | } | |
1851 | ||
1852 | err = ar9170_disable_key(ar, key->hw_key_idx); | |
1853 | if (err) | |
1854 | goto out; | |
1855 | ||
1856 | if (key->hw_key_idx < 64) { | |
1857 | ar->usedkeys &= ~BIT(key->hw_key_idx); | |
1858 | } else { | |
1859 | err = ar9170_upload_key(ar, key->hw_key_idx, NULL, | |
1860 | AR9170_ENC_ALG_NONE, 0, | |
1861 | NULL, 0); | |
1862 | if (err) | |
1863 | goto out; | |
1864 | ||
97359d12 | 1865 | if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
e9348cdd CL |
1866 | err = ar9170_upload_key(ar, key->hw_key_idx, |
1867 | NULL, | |
1868 | AR9170_ENC_ALG_NONE, 1, | |
1869 | NULL, 0); | |
1870 | if (err) | |
1871 | goto out; | |
1872 | } | |
1873 | ||
1874 | } | |
1875 | } | |
1876 | ||
1877 | ar9170_regwrite_begin(ar); | |
1878 | ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_L, ar->usedkeys); | |
1879 | ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_H, ar->usedkeys >> 32); | |
1880 | ar9170_regwrite_finish(); | |
1881 | err = ar9170_regwrite_result(); | |
1882 | ||
1883 | out: | |
1884 | mutex_unlock(&ar->mutex); | |
1885 | ||
1886 | return err; | |
1887 | } | |
1888 | ||
e9348cdd CL |
1889 | static int ar9170_get_stats(struct ieee80211_hw *hw, |
1890 | struct ieee80211_low_level_stats *stats) | |
1891 | { | |
1892 | struct ar9170 *ar = hw->priv; | |
1893 | u32 val; | |
1894 | int err; | |
1895 | ||
1896 | mutex_lock(&ar->mutex); | |
1897 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TX_RETRY, &val); | |
1898 | ar->stats.dot11ACKFailureCount += val; | |
1899 | ||
1900 | memcpy(stats, &ar->stats, sizeof(*stats)); | |
1901 | mutex_unlock(&ar->mutex); | |
1902 | ||
1903 | return 0; | |
1904 | } | |
1905 | ||
a55427e8 JL |
1906 | static int ar9170_get_survey(struct ieee80211_hw *hw, int idx, |
1907 | struct survey_info *survey) | |
1908 | { | |
1909 | struct ar9170 *ar = hw->priv; | |
1910 | struct ieee80211_conf *conf = &hw->conf; | |
1911 | ||
1912 | if (idx != 0) | |
1913 | return -ENOENT; | |
1914 | ||
1915 | /* TODO: update noise value, e.g. call ar9170_set_channel */ | |
1916 | ||
1917 | survey->channel = conf->channel; | |
1918 | survey->filled = SURVEY_INFO_NOISE_DBM; | |
1919 | survey->noise = ar->noise[0]; | |
1920 | ||
1921 | return 0; | |
1922 | } | |
1923 | ||
e9348cdd CL |
1924 | static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue, |
1925 | const struct ieee80211_tx_queue_params *param) | |
1926 | { | |
1927 | struct ar9170 *ar = hw->priv; | |
1928 | int ret; | |
1929 | ||
1930 | mutex_lock(&ar->mutex); | |
e9d126cd | 1931 | if (queue < __AR9170_NUM_TXQ) { |
e9348cdd CL |
1932 | memcpy(&ar->edcf[ar9170_qos_hwmap[queue]], |
1933 | param, sizeof(*param)); | |
1934 | ||
1935 | ret = ar9170_set_qos(ar); | |
e9d126cd | 1936 | } else { |
e9348cdd | 1937 | ret = -EINVAL; |
e9d126cd | 1938 | } |
e9348cdd CL |
1939 | |
1940 | mutex_unlock(&ar->mutex); | |
1941 | return ret; | |
1942 | } | |
1943 | ||
9e52b062 | 1944 | static int ar9170_ampdu_action(struct ieee80211_hw *hw, |
c951ad35 | 1945 | struct ieee80211_vif *vif, |
9e52b062 | 1946 | enum ieee80211_ampdu_mlme_action action, |
0b01f030 JB |
1947 | struct ieee80211_sta *sta, u16 tid, u16 *ssn, |
1948 | u8 buf_size) | |
9e52b062 JB |
1949 | { |
1950 | switch (action) { | |
1951 | case IEEE80211_AMPDU_RX_START: | |
1952 | case IEEE80211_AMPDU_RX_STOP: | |
acbadf01 CL |
1953 | /* Handled by firmware */ |
1954 | break; | |
1955 | ||
9e52b062 JB |
1956 | default: |
1957 | return -EOPNOTSUPP; | |
1958 | } | |
acbadf01 CL |
1959 | |
1960 | return 0; | |
9e52b062 JB |
1961 | } |
1962 | ||
e9348cdd CL |
1963 | static const struct ieee80211_ops ar9170_ops = { |
1964 | .start = ar9170_op_start, | |
1965 | .stop = ar9170_op_stop, | |
1966 | .tx = ar9170_op_tx, | |
1967 | .add_interface = ar9170_op_add_interface, | |
1968 | .remove_interface = ar9170_op_remove_interface, | |
1969 | .config = ar9170_op_config, | |
3ac64bee | 1970 | .prepare_multicast = ar9170_op_prepare_multicast, |
e9348cdd CL |
1971 | .configure_filter = ar9170_op_configure_filter, |
1972 | .conf_tx = ar9170_conf_tx, | |
1973 | .bss_info_changed = ar9170_op_bss_info_changed, | |
1974 | .get_tsf = ar9170_op_get_tsf, | |
1975 | .set_key = ar9170_set_key, | |
e9348cdd | 1976 | .get_stats = ar9170_get_stats, |
a55427e8 | 1977 | .get_survey = ar9170_get_survey, |
9e52b062 | 1978 | .ampdu_action = ar9170_ampdu_action, |
e9348cdd CL |
1979 | }; |
1980 | ||
1981 | void *ar9170_alloc(size_t priv_size) | |
1982 | { | |
1983 | struct ieee80211_hw *hw; | |
1984 | struct ar9170 *ar; | |
cca84799 | 1985 | struct sk_buff *skb; |
e9348cdd CL |
1986 | int i; |
1987 | ||
cca84799 CL |
1988 | /* |
1989 | * this buffer is used for rx stream reconstruction. | |
1990 | * Under heavy load this device (or the transport layer?) | |
3ad2f3fb | 1991 | * tends to split the streams into separate rx descriptors. |
cca84799 CL |
1992 | */ |
1993 | ||
879999ce | 1994 | skb = __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE, GFP_KERNEL); |
cca84799 CL |
1995 | if (!skb) |
1996 | goto err_nomem; | |
1997 | ||
e9348cdd CL |
1998 | hw = ieee80211_alloc_hw(priv_size, &ar9170_ops); |
1999 | if (!hw) | |
cca84799 | 2000 | goto err_nomem; |
e9348cdd CL |
2001 | |
2002 | ar = hw->priv; | |
2003 | ar->hw = hw; | |
cca84799 | 2004 | ar->rx_failover = skb; |
e9348cdd CL |
2005 | |
2006 | mutex_init(&ar->mutex); | |
2007 | spin_lock_init(&ar->cmdlock); | |
2008 | spin_lock_init(&ar->tx_stats_lock); | |
9b9c5aae CL |
2009 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { |
2010 | skb_queue_head_init(&ar->tx_status[i]); | |
2011 | skb_queue_head_init(&ar->tx_pending[i]); | |
2012 | } | |
cca84799 | 2013 | ar9170_rx_reset_rx_mpdu(ar); |
e9348cdd | 2014 | INIT_WORK(&ar->beacon_work, ar9170_new_beacon); |
9b9c5aae | 2015 | INIT_DELAYED_WORK(&ar->tx_janitor, ar9170_tx_janitor); |
e9348cdd CL |
2016 | |
2017 | /* all hw supports 2.4 GHz, so set channel to 1 by default */ | |
2018 | ar->channel = &ar9170_2ghz_chantable[0]; | |
2019 | ||
2020 | /* first part of wiphy init */ | |
2021 | ar->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | | |
2022 | BIT(NL80211_IFTYPE_WDS) | | |
2023 | BIT(NL80211_IFTYPE_ADHOC); | |
2024 | ar->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS | | |
2025 | IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | | |
f5c044e5 | 2026 | IEEE80211_HW_SIGNAL_DBM; |
e9348cdd | 2027 | |
4a48e2a4 | 2028 | ar->hw->queues = __AR9170_NUM_TXQ; |
e9348cdd | 2029 | ar->hw->extra_tx_headroom = 8; |
e9348cdd CL |
2030 | |
2031 | ar->hw->max_rates = 1; | |
2032 | ar->hw->max_rate_tries = 3; | |
2033 | ||
2034 | for (i = 0; i < ARRAY_SIZE(ar->noise); i++) | |
2035 | ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */ | |
2036 | ||
2037 | return ar; | |
cca84799 CL |
2038 | |
2039 | err_nomem: | |
2040 | kfree_skb(skb); | |
2041 | return ERR_PTR(-ENOMEM); | |
e9348cdd | 2042 | } |
e9348cdd CL |
2043 | |
2044 | static int ar9170_read_eeprom(struct ar9170 *ar) | |
2045 | { | |
2046 | #define RW 8 /* number of words to read at once */ | |
2047 | #define RB (sizeof(u32) * RW) | |
608b88cb | 2048 | struct ath_regulatory *regulatory = &ar->common.regulatory; |
e9348cdd CL |
2049 | u8 *eeprom = (void *)&ar->eeprom; |
2050 | u8 *addr = ar->eeprom.mac_address; | |
2051 | __le32 offsets[RW]; | |
acbadf01 | 2052 | unsigned int rx_streams, tx_streams, tx_params = 0; |
e9348cdd CL |
2053 | int i, j, err, bands = 0; |
2054 | ||
2055 | BUILD_BUG_ON(sizeof(ar->eeprom) & 3); | |
2056 | ||
2057 | BUILD_BUG_ON(RB > AR9170_MAX_CMD_LEN - 4); | |
2058 | #ifndef __CHECKER__ | |
2059 | /* don't want to handle trailing remains */ | |
2060 | BUILD_BUG_ON(sizeof(ar->eeprom) % RB); | |
2061 | #endif | |
2062 | ||
2063 | for (i = 0; i < sizeof(ar->eeprom)/RB; i++) { | |
2064 | for (j = 0; j < RW; j++) | |
2065 | offsets[j] = cpu_to_le32(AR9170_EEPROM_START + | |
2066 | RB * i + 4 * j); | |
2067 | ||
2068 | err = ar->exec_cmd(ar, AR9170_CMD_RREG, | |
2069 | RB, (u8 *) &offsets, | |
2070 | RB, eeprom + RB * i); | |
2071 | if (err) | |
2072 | return err; | |
2073 | } | |
2074 | ||
2075 | #undef RW | |
2076 | #undef RB | |
2077 | ||
2078 | if (ar->eeprom.length == cpu_to_le16(0xFFFF)) | |
2079 | return -ENODATA; | |
2080 | ||
2081 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) { | |
2082 | ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar9170_band_2GHz; | |
2083 | bands++; | |
2084 | } | |
2085 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) { | |
2086 | ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &ar9170_band_5GHz; | |
2087 | bands++; | |
2088 | } | |
acbadf01 CL |
2089 | |
2090 | rx_streams = hweight8(ar->eeprom.rx_mask); | |
2091 | tx_streams = hweight8(ar->eeprom.tx_mask); | |
2092 | ||
2093 | if (rx_streams != tx_streams) | |
2094 | tx_params = IEEE80211_HT_MCS_TX_RX_DIFF; | |
2095 | ||
2096 | if (tx_streams >= 1 && tx_streams <= IEEE80211_HT_MCS_TX_MAX_STREAMS) | |
2097 | tx_params = (tx_streams - 1) << | |
2098 | IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT; | |
2099 | ||
2100 | ar9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params; | |
2101 | ar9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params; | |
2102 | ||
e9348cdd CL |
2103 | /* |
2104 | * I measured this, a bandswitch takes roughly | |
2105 | * 135 ms and a frequency switch about 80. | |
2106 | * | |
2107 | * FIXME: measure these values again once EEPROM settings | |
2108 | * are used, that will influence them! | |
2109 | */ | |
2110 | if (bands == 2) | |
2111 | ar->hw->channel_change_time = 135 * 1000; | |
2112 | else | |
2113 | ar->hw->channel_change_time = 80 * 1000; | |
2114 | ||
608b88cb LR |
2115 | regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]); |
2116 | regulatory->current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]); | |
1878f77e | 2117 | |
e9348cdd CL |
2118 | /* second part of wiphy init */ |
2119 | SET_IEEE80211_PERM_ADDR(ar->hw, addr); | |
2120 | ||
2121 | return bands ? 0 : -EINVAL; | |
2122 | } | |
2123 | ||
1878f77e CL |
2124 | static int ar9170_reg_notifier(struct wiphy *wiphy, |
2125 | struct regulatory_request *request) | |
2126 | { | |
2127 | struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); | |
2128 | struct ar9170 *ar = hw->priv; | |
2129 | ||
608b88cb | 2130 | return ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory); |
1878f77e CL |
2131 | } |
2132 | ||
e9348cdd CL |
2133 | int ar9170_register(struct ar9170 *ar, struct device *pdev) |
2134 | { | |
608b88cb | 2135 | struct ath_regulatory *regulatory = &ar->common.regulatory; |
e9348cdd CL |
2136 | int err; |
2137 | ||
2138 | /* try to read EEPROM, init MAC addr */ | |
2139 | err = ar9170_read_eeprom(ar); | |
2140 | if (err) | |
2141 | goto err_out; | |
2142 | ||
608b88cb | 2143 | err = ath_regd_init(regulatory, ar->hw->wiphy, |
1878f77e | 2144 | ar9170_reg_notifier); |
85efc86e LR |
2145 | if (err) |
2146 | goto err_out; | |
1878f77e | 2147 | |
e9348cdd CL |
2148 | err = ieee80211_register_hw(ar->hw); |
2149 | if (err) | |
2150 | goto err_out; | |
2151 | ||
608b88cb LR |
2152 | if (!ath_is_world_regd(regulatory)) |
2153 | regulatory_hint(ar->hw->wiphy, regulatory->alpha2); | |
1878f77e | 2154 | |
e9348cdd CL |
2155 | err = ar9170_init_leds(ar); |
2156 | if (err) | |
2157 | goto err_unreg; | |
2158 | ||
2159 | #ifdef CONFIG_AR9170_LEDS | |
2160 | err = ar9170_register_leds(ar); | |
2161 | if (err) | |
2162 | goto err_unreg; | |
2163 | #endif /* CONFIG_AR9170_LEDS */ | |
2164 | ||
2165 | dev_info(pdev, "Atheros AR9170 is registered as '%s'\n", | |
2166 | wiphy_name(ar->hw->wiphy)); | |
2167 | ||
53576517 JB |
2168 | ar->registered = true; |
2169 | return 0; | |
e9348cdd CL |
2170 | |
2171 | err_unreg: | |
2172 | ieee80211_unregister_hw(ar->hw); | |
2173 | ||
2174 | err_out: | |
2175 | return err; | |
2176 | } | |
e9348cdd CL |
2177 | |
2178 | void ar9170_unregister(struct ar9170 *ar) | |
2179 | { | |
53576517 | 2180 | if (ar->registered) { |
e9348cdd | 2181 | #ifdef CONFIG_AR9170_LEDS |
53576517 | 2182 | ar9170_unregister_leds(ar); |
e9348cdd CL |
2183 | #endif /* CONFIG_AR9170_LEDS */ |
2184 | ||
2185 | ieee80211_unregister_hw(ar->hw); | |
53576517 JB |
2186 | } |
2187 | ||
2188 | kfree_skb(ar->rx_failover); | |
e9348cdd CL |
2189 | mutex_destroy(&ar->mutex); |
2190 | } |